They should have "gang tackle hit stick", where, if a player is breaking a tackle, or is getting taken down by the defender's teammates somehow, the defender of choice could lay the wood on the slowed-down defender and he would either be stopped, slowed down, or blown back. As it is, if the runner is falling forward, no amount of defenders will push him back, they just fall over. This would be a big addition to me.
-zpert