They initially said that Viera would probably be the last race they'd ever make...it's obvious now that they were lying. Hrothgar gives us 2 new races but with 2 different clans. It would have been more work to do 2 genders for each I'm guessing. It was probably either Hrothgar or male Viera (which I'm sure more people actually wanted) so they decided to gamble and add 2 races instead of just one. It also throws a bone to the people who wanted a more bestial race to play as. It was a risky move that may or may not pay off. Time will tell.