The thing about avoiding dying is that the team that's waiting for someone to die might end up getiing taken over due to the fact that they would be chilling back at base.(Other team charges all together) If that happens 2 things can happen, defending team kill the attackers, attacking team gets the flag and that one person dies anyways. Also rebalancing is more likely to not be fun because you could be swapped to the losing team.
If 2 or 3 people in a team are waiting out a death then don't be surprised when the other team gets an advantage.