Amazing art, though the only two things that I think could be better is (not to sound like a perv) that her breasts are too small/shapeless or she looks too mature. Either of the two.
Also her face looks a bit ogre-ish. Head too wide and nose and mouth are a bit meh, probably also wide.
That's my two cents though, besides that it's amazing!
The word "better" is quite ambiguous, i can think of three possible meanings, the first one is in the sense that it would be more appealing either subjectively or if that is possible objectively, the second is in terms of anatomy errors that need to be avoided in any case and the third meaning would be that it could more closely resemble the original design since this is fanart. I assume that you use it in the third sense, that still is ambiguous though because there are the concept artworks that can be seen in the
wallpapers and the in-game sprites which look a lot different.
Either way, there's something i should have noted before and that is that i did not try to stay true to the original designs (as seen in the wallpaper) because quite frankly i don't like them very much and there is not very much 3D information to be extracted from the sprites. So what you said is true and i am aware of it. It's also quite hard to have a face with glowing eyes not look ogre-ish actually; at some point she looked like an authentic alien.
Besides that, thanks for the compliments (read your comment on dA, Zoko).
≫Edit≪Did some adjustments on the base model just for fun, tried to modify some of the aspects mentioned, so tell me if this would have been better:
WARNING: There be nipple indications this time.[Link](This link is temporary, i will remove the file again.)