I see team balance (or lack there of) is talked about a lot regarding Dirty Bomb. I think the biggest problem is there is nothing in it for the person(s) to switch to a losing team in order to help them out… other than having a fair fun game of course.
To fix that, it might be interesting to award a credit bonus along with a successful “shuffle teams by skill” vote.
While I do like playing with some of my friends on the same team, it is also fun to not win, or lose by a landslide and it would be in the best interest to keep things fair.
Another problem however is that Rank is not a very good indicator of skill. Perhaps when player stats are recorded (Kill/Death Ratio, accuracy, etc) then something like this could be adapted, with a reward to all players for keeping things fair.