And there in lies the problem. Like I said earlier, the call is subjective & decided by the refs. When the shoulder goes down the head goes down with it & depending where the ref is & his viewing angle, the flag can get tossed a lot.
In that play I agree. That's 15 yards against AD & nullifies a nice run & negates the yards on his quest to beat Dickerson's record. IMO, Refs will toss the flag on the side of caution, especially early in the season.
You wait, those calls will affect the outcome of a game(s).