This begs the question, what are we aiming for again? Do we want the sprite to resemble the official art or the in-game model? We obviously have our minds set on two different references, both being completely legitimate but surprisingly different.
Alright, I might as well go all-out with my opinions on Aegislash here. My main goal here is to answer the question above, although I also have a couple of other minor concerns about the sprites that I'll address when that's done. Stay tuned for more "Really Annoying and Unecessarily Long Wall of Text".
Anyways, the difference between official artwork, in-game, and BW sprite references is always an issue. But yes, I've also noticed that in Aegislash's case, there are significant differences in proportions rather than trivial elements such as colours or pose. When I started doing the final QC, I made a conscious decision not to use the official artwork as a reference. The reasons being that the official artwork has a lot of inconsistencies between the shield and blade formes that the in-game models lack. I might as well list them.
- The shield forme has significantly longer arms than the blade forme.
- The fingers are shaped very differently in each.
- On the blade forme, the arms start getting thicker right after the joint. On the shield forme, they stay the same thickness up until the hands.
The in-game model lacks these flaws. There is one minor difference in that the shield forme's arms are somewhat thicker than those of the blade forme's (which is partially due to the angle at which it's viewed as well as the actual thickness), but I think that's much less of an issue compared to the differences in the official artwork.
The other reason is that on the official artwork's blade forme, Aegislash is gripping the shield from above rather than the side. Frankly, that's just weird. Nobody holds a shield like that. On the in-game model, Aegislash properly holds the shield from the side, and you can even see the pattern on the front has rotated 90 degrees clockwise.
As for the differences in the shield pattern, I had already used the in-game model as reference for everything else, might as well for that too.
This is my rationale behind disregarding the official artwork as a reference, and why I think that the in-game model is overall superior.
Moving onto the sprite itself rather than the reference used. These issues are much more minor.
For the eye, I'm fine with compromising and using your version of it. I might as well explain why I made it so thin. Besides not really having enough room in the black space to make it wider, I figured that a more vertical eye would help make the sprite seem more like it was facing to the side rather than straight ahead. However, you've managed to make it the right shape without making the face's proportions all out of whack. I'm willing to accept that, but I think the entire eye needs to be moved one pixel to the right. It's not facing far enough to the left to justify putting it so off center.
Also, your palette changes are objectively better, as they allow the shiny version to be recoloured properly. It does strike me as a bit too far on the pale side, but it's not that big of a deal.
Lastly, I want to address the more metallic texture to yours. I certainly can't deny that it's cool, but I think it's a bit overdone, especially compared to other metallic Pokémon and their BW sprites.
None of them are really that lustrous. Of course, I think the biggest problem is with the blade forme's white diagonal line across it. I don't think it would be much more distracting if it was coloured bright red, and it really shouldn't be there.
I might as well mention my current animation for Aegislash. I'm completely aware that it has a bit too much movement. However, I figured it was better to fall above the necessary amount rather than below, as it's always easier to edit things so that they move less rather than more. Of course I don't want to fix it just yet, since further changes are guarenteed at this point.
On an unrelated note,
princessofmusic, I can't resist the temptation to recommend a couple of Doctor Who episodes. Definitely watch The Eleventh Hour (season 5 episode 1), it's hands down one of the best episodes of the series. Also, since people tend to love David Tennant so much (I think he's great and all, but not quite as good as Matt Smith), I think that Partners in Crime (season 4 episode 1) is a good one of his episodes.
EDIT: Ok, I completely missed that the above post now has a new version edited into it, since it took me so long to write this. It's not without flaws, but I really like it a lot now. One thing is that the shield and blade formes are holding the shield improperly, but the explanations as to why are VERY lengthy. I've done enough so far.
ANOTHER EDIT: One other thing I specifically want to call some attention to is
Mega Gardevoir. It also had massive differences between the official artwork and the in-game model, but I believe that most people agreed that the official artwork was better, so it was used as the primary reference for the sprite. So essentially, I don't mean to say that in-game should always trump official artwork, but it'll often be clear which reference is overall better.