Battlerage Vigor is (as far as I'm concerned) broken. With a capital B. And a capital everything else, for that matter. Especially at heroic tier, Battlerage Fighters are nigh-unkillable. BRV essentially forces the DM to use mostly ranged attackers. Sure, it's fun for the person playing the fighter, but its unfun for the DM and unfun for everyone else in the party. I've seen it in play, I've read about other people's experiences, and let me tell you this; BRV is BAD FOR THE GAME.
Letting one person be a super-powered killing machine does not a good game make.