Going by official art for IV After Years, Dwarves would just be typical fantasy proportions, if not slightly taller. I mean, I guess we could just add dwarves for the niche, but it's certainly not original.
Burmecians practically exist in form as Qiqurn. They would just be slightly more human-like.
There's also a niche for the little humanoid critter type, sure. But as the argument for "elezens with bunny ears" is made, they are just more lithe lalafell with fuzzy faces.
Ronso I guess just taking femroe skeletons and adding a tail. Male roe are far too meaty, but female roe fit the proportions of Ronso, who didn't really have a significant difference in stature between male and female. Also just fuzzy faces, and obnoxious horns.
The Qu is probably the only real head scratcher... but to be honest, how many people would actually willingly play a Qu outside of a brief chuckle to justify the development time for it? I doubt even the devs would be serious about making it.
At least with Viera, and not a fan of it either, you'd get mileage out of the effort cause people will clearly play it.