I'd rather not have Viera in the game, as well. This game already borrows from FFXI's races (in terms of general forms), barring the Au'ra, as far as I know. I never played the game, myself, so please correct me if I'm wrong.

Although, speaking of Au'ra, do we know when their horns and scales develop? Because if they begin to develop to some extent in the womb, then I would imagine that female Au'ra would have specifically evolved to be able to birth horned and scaled children without undue harm being caused to them during labor (beyond the pains of giving birth, to begin with). As such, I'd have a hard time believing that a female of any other race could bear a child with a male Au'ra without having severe complications.