Down field on an offensive play is absolutely no different. Players chasing a play looking at the guy with the ball and getting cut blocked is the same no matter what type of pay it is offense or change of possession. I dont disagree that Suh shouldnt have made the play but if its illegal there it should be a rule change making open field cut blocks illegal. If defensive players cant do it then why should offenses be given free reign to cut the ends or lbs on swing passes and screens. My point is its either a dangerous play across the board or its not a dangerous play at all.
I think they didn't want a grey area on change of possessions, that's why both o and d can't chop on a change of posession. I see this mostly called on the offense, Stafford has been called for it, most times its guys going low hopping to create a pile that the runner gets caught up. Not dirty but still dangerous.