If the intention of this crackdown is to stop players from coming in contact with the head then the NRL has to let this run its course, at least for a few months. If the number of sin bin/reportable incidents hasn't decreased by then and we're still getting four binnings a game across most matches then the conclusion might well be it's just impossible for these to be eradicated from the game and the price that will be paid is an overall inferior product for the fan and the broadcasters.
But as we've seen before once the coaches and the media vent their outrage the inevitable backflip will happen, most likely from next round.