That's always the risk but as it stands now they still look inhuman but just a lame design. If all the races looked more or less the same what would be the point?
Arg's aren't the most popular race but the way they've grouped the factions seems to account for this. Although saying that I can still see a faction imbalance with the ebonheart pact over the other two. I imagine most people will play dark elfs or nords.