I think the question of whether Hyurs should have a full range of real-world-equivalent racial features gets muddled by the presence of other races. Hyurs are "the" human race by our view, but from an Eorzean view all the others are equally human. If that's the case, should Midlander Hyurs even be able to 'claim' all the different races? Is that a good or a bad thing? Eg. there are no 'Mongolian' Hyurans because the equivalent people are all Xaela instead. "Lack of representation" by real world standards versus "lack of fantasy diversity" if you stick to 'realistic' Hyurans everywhere instead of making other races more 'interesting'.
And then you get weird examples like the Vanu Vanus drawing from a 'Pacific Islander' vibe (forgive me not being more specific) - is it good that there's some representation of those cultures, or bad that it got packaged as belonging to hulking birdmen instead of "humans"? Is it then a problem if you can't replicate a real-world person from those cultures within the Hyuran character options, or do you just say "that makes sense, that culture doesn't exist as a human tribe in this world anyway"?
It's a can of worms, and I'm sure different people would have different opinions on it. I don't have an answer, just tricky questions.