You are forgetting that the OL knows the snap count so in honestly it is not truly fair when you have a QB can utilize hard counts and head movements and OL and motion guys can work in unison to fake a DL. If a DL does not make contact and is not even close to making contact, he should be allowed to get back just like it was forever. They are at a disadvantage to begin with. This is just another example of changing a rule that didn’t need fixing. OL know the snap count and are not allowed to move until the ball is snapped. Without contact or significant threat of being run over, the OL should not be allowed to move.