I am all for this. I started on Heartseeker when it opened in September. Took a break in October from shaman when I got him to 40 to try a paladin, after getting the Paladin to 44, I came back In November to the Shaman to find the balance was way worse than it was in October. And it was clear to me neither Horde players nor Alliance players (generally speaking) like to be the underdog. My guild is the second to last guild left on the server for Horde.
It appears some alliance like a PvP server like ours: