No. No. No!
Homogenization is one of the worst things about modern WoW. Thankfully, Blizzard has been walking that back a bit over the last couple expansions (referring to class/spec homogenization).
The idea that you would want Blizzard to make the same mistake with races that they did with classes is just mind-boggling to me. Choices are interesting. If all you want is to have different skins in your game with everyone being the same gameplay/stat-wise, go play Fortnite.
Note: I do think Blizzard should do something to address potential racial imbalance between Horde and Alliance, but that does NOT mean making all races the same. NO!