That definitely helps. I imagine there will be people foaming at the mouth waiting for the first time the penalty is incorrectly called though (which is bound to happen).
Those Rugby rules make sense and are clear. The problem is that the NFL rule is not as clear and it seems the interpretation is different if the stuff I posted from Schefter is correct on what counts as a hip drop tackle in the NFL. Specifically the Rotate part of the Rugby rule where it says you have to swing or rotate your behind behind the ball carrier and then put your weight on the players legs is not at all as clear in the NFL rule. The NFL rule just says you have to swivel and then drop your weight on the lower body. Nothing about rotating to get behind the player which is what cause the real danger of a knee getting bent back like with a horse collar tackle.