It all depends on whether the Hrothgar are real and also what they end up being. If they're not an additional race, I'd say there's greater scope to experiment with dimorphic Viera subraces. I wish they'd done it with au ra. I understand it's not the easiest thing to do, but unfortunately if it isn't done at the outset it's unlikely it'll ever happen.

Two distinct Viera subraces and Hrothgar, all with no gender lock, would be considerable work. At the moment, I'd be happy with just avoiding a gender lock and getting Viera approximating the art I posted. Anything else would be a bonus.