Can't make Zero that unique or people would start asking SE to make it a playable race.
What I don't understand is if Zero's personality is boring, then how is it suddenly acceptable if her race were put on something other than a Hyur? Surely race can't be the only defining features that makes a character interesting or not. That's like saying Zero would be a more tolerable character if they had made her a Femroe instead or something. Personality would all be the same even if you substitute the race away.