I think more customizations for base races including body type presets (fat, muscular, lean, etc) would probably cut down on most of the new race demands; obviously something like Tuskar or centaurs excluded…
There’ just a ton of things they could do with core races/ARs to flesh them out, for example Fel/Felblood Orcs and less hulking bodies for Warlocks. Both of these make sense.
Manari Eredar skins and less roided body shapes for Draenei with a short quest chain like the Darkr anger skins to explain how the Manari decided to rejoin Draenei society, etc.
I would disagree because youre working to add another armed force to your side narratively. The ability to make a new character from those additional forces is just natural progression of logic, despite many other such races being unused thus far (taunka, gilgoblins, etc)
Personally before more allied races i think they should do another character model update like they did in WoD. some of the models are starting to look a little dated with some like nightborne hairstyles being really low quality textures. same with some human hairstyles. they could add more customization options at the same time as well