I'm trying to draw a lineup of the main cast, for a larger scene with original characters, but unlike OCs, these present a problem, in that they have an established look, which I have to replicate.

I'd like some pointers here, maybe some traits or features I've missed, or things I drew wrong. Don't pay attention to the sketchiness, this is just a sketch before proper drawing. Pointers on wrong anatomy would also be useful, because for me at least, wings seem to be the new hands, and ponies in general are still a rather new item.