The thing that's so frustrating about this is the further imbalance it sets up between defense and offense. If they're going to stop the defenders from hitting, they need to start calling some of the crap the offensive linemen do more closely, too, especially things like high-low chop blocks. And get rid of the rule that quarterbacks can just chuck the ball away when they get outside the tackle box. Make it intentional grounding if they do that. There's no need to protect the quarterbacks any further given the other rules that prevent real hits.