I'll be honest, I don't think that will happen and I don't really want to see any new playable races at this point. I do like that you put some thought into it though, and using the "astral" and "umbral" nomenclature of the game was a nice touch. Perhaps in the next Final Fantasy MMO they could consider something like this.

A while back, I remember someone else asking for a winged race (I think it was the Gria from FF Tactics A2). Maybe they could make a comeback some day, although I'm not sure they are popular enough. I actually think a winged race would have been a perfect addition for Heavensward, as that is the expansion that first introduced flying. They wouldn't even need a mount to take to the skies!