So when your entire team is suicidal and full impulses straight ahead to get slaughtered in first 30 seconds and you are only one left you are supposed to just stay and get ganked repeatedly? no thanks, this just happen to me this morning, no point in wasting time if teams are grossly unbalanced and you are stuck with team full of suicidal players.
It would be nice if something could be done about that too. However, suicidal PuGs waste less time than the group that quits (for very good reason, because there is always a good reason to quit!) only 2 kills from the end or the guy who thinks logging out to avoid death is a valid mechanic.
Plus, building a team can solve the suicidal teammate problem.