If your team manages to push past a checkpoint and the other team has not, you should win at the timers end regardless of who is standing where. Nothing worse then getting team killed in a staggered way only to never have enough forces to ply the point back in overtime loosing your what should of been clear victory. Or be stuck in an overtime for longer then the original match length.
And on a bit of a different but similar point, capping tank/healers per match. It is next to impossible sometimes to remove a pair of tanks from the crystal. This causing stupidly long overtimes.