The larger Tauren avatars are hell to navigate as a multiboxer, especially inside AV towers and what-not. It's not an insignificant consideration.

Orcs are compact and easy to steer/follow. They also have some nice racials... Trolls definitely have a coolness factor (I have troll hunters), but for the shaman team, it was Orcs, no question.

Warstomp on round robin does NOT outweigh the downsides of dealing with the larger avatar, IMO...