Das Impossible!xD
what fantasy you have OMG!!!xD
in this picture, i think AlphaLeo looks like a 14-5-6 year old
very very very very nice

awesome

Nice characters! ^_^

Yowsah!! You both rock doing syncronised poses!! I also really love the clothes they wear and their respective logos!! Wonderful touches. ^_^

*clapping* ^^

aaggmmmmmmm! so hard to choose

grate job.

Ta-daa! That's the first thing that came to mind. I've been looking at this piece for a few days now, building up what to say and finding the right moment to let it all out.

I have to say I've really grown fond of this picture. I know it has nothing to do with technical things or colour schemes (which I'll get to later on). Instead of the objective side of art, what captivates me the most is the subjective part, the things that it makes me feel. Isn't that what posting your art is about? Showing what you feel, but also having your work become a medium through which the viewers can see their own emotions reflected.
To me, this picture struck a very old, very deeply-rooted part. Truth to say I've been watching your art for years, ever since I discovered the furry community and "Yerf.com". Your art has always been wonderful, a product of your incredible talent. But more than that, I always found your art approachable, warm and comfortable.
I don't know if I'm making sense, here. But there are works out there that are also jaw-droppingly incredible, but in a way you get this sensation of coldness, of distance. It's like you're viewing this through a wall of some sorts, and you can't feel anything.. or if you do feel something, you feel like you're almost intruding, that you're not welcome. Such is NOT the case with yours. As I said, your art is warm, friendly and you feel, as a viewer, invited. It's always pleasant to look at your art.
Also, this picture inspires a sense of wonder that goes beyond artistic talent. Again, it's hard to explain. Take, for example, the Gundam picture you drew a while ago. It's a masterpiece, a real product of real talent. In this picture, on the other hand, the amazement comes not principally from the technical details, but of the feelings one senses in every colour and line.
Looking at this picture, I can imagine myself once more like a 15-year-old browsing through Yerf and finding something done by you. It's the same old sense of wonder and amazement, like real magic. It's been present in all your works, Leo, but this one hits deeper in some way. I just feel it, somehow.

Artwise, I feel like this piece could be a landmark of some sorts. You say Lillidan's leaving to Australia (best of luck to her in her studies!), and that you want to redo your logo after 6 years. Feels like things are changing, and this picture serves as a snapshot of the moment, somehow capturing the emotions. Maybe one day after 10 years or so, you'll look back at this piece, and you'll still find the emotions fresh on it, and you'll see how you've changed since the time you posted this.
I'm sorry, I'm having trouble getting into commenting the lines and colours and whatnot (as you asked for an advanced critique), but I can't get over the feelings you get from this pic.

OK... let's do this. The one thing I really noticed is that both Alpha and Lillian have exactly the same pose. It's not a general similarity, it's completely identical, apart from the height difference. The little details give it away. The footpaws are exactly the same, the thumb sizes and the alignment of the outstretched hand's fingers. How did you do this? This is not really critique (I'll get to that in a second) but an honest question. Did you utilize exactly the same skeleton, or did you take a "template" pose and work over it?
It's not bad, actually. It's very good! You really have to scrutinize both characters to notice (as I said, the little details are what gave it away), but if you just look at it, even as a first glance, the symmetry hits your brain at an unconscious level, and you are immediately (and without knowing) pleased by the uniformity. I could go in to the aesthetic qualities of symmetry, but I know you're already well versed in it.
Critically, though, there is one thing that breaks the perfection. You see, Alphaleo takes up more space than Lillian. This means that the center of the picture is not at the exact middle between both characters. I think you were afraid to have them touch, maybe because interaction means breaking the mold you used for both. I, personally, think it would have been nice if you had moved Lillian's character a bit closer, and maybe doing something playful and silly with both tails. There are only pixels from the outlines of both characters touching, so there's no real closeness. You could split this picture into two pieces, and none would be the wiser. I suggest you make them interact, or else there's not much reason to have them together. Hope I'm not being too harsh-sounding ^^''

The characters themselves are GORGEOUS! It's the warm style you utilize that evokes such warm feelings (as stated in the first paragraphs). They feel alive. I think that's one of your biggest accomplishment, that your characters aren't effigies or symbols, but almost real creatures.
I do have to give you some criticism on Alphaleo, though. There's something about his grin that doesn't look right. I think the lower jaw is too forward, making him look somewhat unrealistic. In a normal (ideal) grin, the lower set of teeth are set behind the front. Now move your jaw forward so both upper and lower sets are perfectly aligned. That's how I feel Leo looks. He doesn't have an underbite, but he looks uneven. I do wish you would fix it, as I LOVE the big toothy grin you give him. Call it a personal favourite, the wide toothy smile.
I do notice the Kindgom Hearts inspiration, mostly because of the clothing. It has this urban-fantastic-square-disney feel to it. And, of course, ZIPPERS! KH seems to love the zippers, and you incorporated that right into the clothing.
The only thing I can say is not really criticism, as it looks OK as it is, but it is worth mentioning. I won't want to sound nitpicky, but if you look at the clothing, everything has a lot of folds and creases.. EXCEPT Leo's vest. It looks surprisingly smooth, but it looks nice, too. I don't really think you should change it at all, as the subtle shading you used gives it all the depth it needs. Still, I just wanted to mention it as an observation and not real criticism.

Colouring and shading is PERFECT. Nothing to say about that, other than I am flabbergasted at the smooth transitions from light to dark. Amazing.
Same goes for the background and borders. It's simple but very professional-looking. It really looks like a poster or an advert for some company or movie. Heh heh, and I like the little joke in relation to The Emperor's New Groove. XD

The last thing I want to talk about is the symbol. I won't say anything about Lillian's, as it's really not her picture and thus shouldn't get criticism over it if not asked. On the other hand, I want to focus entirely on yours. Now I really don't understand when you say you "resurrected" the logo. Are you happy with it? Is that the final version you're going to paste on your bike, or are you still working on it?
It's important to me because if you haven't worked on it, I plan to roll my sleeves up and be merciless with every detail. As you'd be redoing it, I want to pitch all the ideas I can to you in hopes that some might be of some help. If if IS the final version, I really don't think I could comment much on it. It's fine as it is (and would look great on your bike).

THIS IS IMPORTANT! If it's already a done symbol, and you weren't originally planning to change it, please don't take the next part too seriously. It's great as it is, but I will be writing this assuming you're not happy with it and want to redo it.

OK, sleeves up. I like the general idea, the while lion with the wind on his back gently blowing his mane. It's inspiring, passionate and at the same time thoughtful. So let's just work on the visual form around this concept.
I think the most important thing here is using the white and blue colours to create something positive. The blue alone gives it the pensive, thoughtful form, as well as working wonderfully as "shadows" to contrast on the white. The problem is, though, that I believe blue and white can be very passive colours that could easily be interpreted with shyness, sensitivity and even meekness. We want a powerful, passionate symbol, one that inspires confidence and brings out the assertive and positive aspects of blue and white.
So, the first thing I believe you we should focus on is the angle of the face. He should at least be pointing straight ahead if you don't want him looking upwards. If he's looking downwards, I feel he looks sad, pensive and even brought down. Notice the way you designed the eyes. Though a triangle, you made the upper part perfectly horizontal. I think the same should apply, in some way, to the face. Think about the lion statues; they're usually looking up (think of the Lion King, even). Downwards means they're stalking or have some kind of negative emotion. We want positive!
We should also think about the overall shape for the symbol. This is important as it would affect where your symbol could be placed. Imagine putting a border around your logo, like a silhouette, and then reducing it to the most basic shapes. What do you get? Would it look rectangular? Triangular? Round?
I think it's better if I used an example. Look at the "V" symbol that is my deviant icon. If you notice, it's not only a triangular figure, but it's designed to also fit perfectly on a square with great symmetry (the eyes are even at almost the exact center). It can also easily be placed on a circular border without any difficulty.
So how about your logo? How do you want to apply it? At a first glance, looking at the way the lettering is placed, I feel you'd go more for the rectangular stickers. The symbol itself, though, is very irregular. It reminds me of a fireball, all perfectly rounded on one side but all flames on the other. In this case, the mane substitutes the fire, but it's a very similar effect. The idea is awesome, as the fire is very positive (white hot flames!!) with the blue giving temperance (it won't burn out of control). The only thing is that the "flame" side is too asymmetric. The upper part of the mane flows downwards, but the lower part flows almost straight. So it's almost impossible to surround it with a basic shape. Is that to your liking? Maybe I'm too focused on fitting it inside borders, when your goal is totally different.
If it IS going to be irregular, then I think you should make the strands of fur on the lower part of the mane as firey as the top. Make it more wavy, more dynamic, more powerful!
On the other hand, if you do wish to make it into a border, take Lillidan's logo as an example. She also uses a firey style, but it's all flowing in a way that it creates an oval. It's not a perfect oval, but the general shape is there, so it looks more uniform.
Lastly, I think you should think about giving the "Faith, Accuracy, Quality" letters some kind of border. The blue alone clashes with certain backgrounds, like the brown. It hurts the eyes andyou can't really read it well. I think you should either give it a white border on blue letters (which would be the opposite format of the "Alphaleo") or make it completely white (like the "Animation"). White looks good with all the colurs, while blue is prone to problems.
Well I hope I've given you enough to think about. With luck, your creative juices might be flowing, and you can pick out ideas you might find useful.

As a final note, I just want to repeat that I really like this picture, Leo. Keep up the awesome work!