Forsaken and Death Knights laughing at your face. Undeads have no problem being playable.
Mag'har Orcs were tied to another reality, for god sake. How is that for lore consideration? Lightforged Draenei are from another planet, entirely. Never been to Azeroth before their addition.
Arrakoa? They have only one model that is not on a playable character level.
Mogu are plausible, with the Rajani faction. But, they have yet to give them updated textures or skeletons (like the new Draenei).
Vrykul are, indeed, viable. Having a male and a female and them getting upgraded looks in Legion. While the males were touched upon in terms of animations, the female was left behind. But, not to worry, because the 'soon to be playable' Kyrians are based on the female Vrykul skeleton. Giving them, or the Drust, a chance to be added.
They are highly, likely, to become playable. You're just not reading the signs. So, essentially, it comes down to you just not loving how they look? that is petty as hell...
As for lore, i don't see it breaking it in any way. We have creatures from multiple dimension living in our world, whether it is Elementals, Demons or Void creatures.
Full-on Ogres would be better. Just give them Mok'nathal customizations like short ears represent half-elves in Blood elves/Void elves.
As for a furry, i think Vulpera kinda filled that role.
I don't know about the rest, but Ogres, Argus Broken and Ankoan are very likely.
They might be giving them Grimtotem customization options:
Except TheRevenantHero, i guess.