According to the devs themselves, they always wanted to make a more "bestial" race. You can see this in the early designs for Au Ra, which were a lot more draconic.
For some reason, they decided to go in a much more human route, and the Au Ra women in particular were made much,
much cuter.
So the Hrothgar were sort of their "do-over" to finally create a bestial race, and even then, they still chickened out and decided not to add women. Personally, I can only hope that when the FemGar finally are released, they look even HALF as badass as the earlier dragonlady designs.