While I'm not keen on some of the Elezen animations, I think it would be a difficult thing to change them now - though it would be nice if they could add some extra animations as alternatives.
I've noticed in cutscenes that Elezen NPCs occasionally do an alternate bow emote (borrowed from Hyuran animations, I think) where the usual dramatic one isn't appropriate. I'd like to have access to that. I don't mind the normal animation but I hate the little backwards stretch they do at the end.