After how badly they've worked viera and hrothgar into the game, I offer an alternative solution:
Add more sub-races and racial variants, and expand on our existing ones, instead of just more races. We know Lowlander Hyur are a thing, even if they mostly use Midlander models and animations. We know Doman Roegadyn are meant to be separate from Sea Wolf and Hellsguard Roegadyn. Let's start getting crazy with that instead of making yet another new race not have hats or working hairdos.