The change in the offensive line
Is from zone blocking, or as Coach Davis said being a catchers mitt. Its a foot work, shielding, picking, stretch play. Played from your heals, and allows you some pass blocking. What he wants, what Coach Brewster wants, is a offensive line forward leaning, esplosive man blocking. Double teams, traps, old school smash mouth. That comes from a hand or forarm delivered to the chin strap. Its played with leverage and the ability to drive the pile back awards, or pancake the man. That change, that pounding may not be effective early, but keep pounding, and the fourth quarter is ours.
Now, then give a power running game, where is the spread. Its a change up, the defense wants to put 8 or 9 in the box to stop the run? A series of spread against that will make the defense chose their poison.
But more importantly the power run game puts pressure on linebacking. The first response is stop the run, a step forward. This is where play action becomes a weapon. It requires great ball handling, faking, a pause, and throwing on time and accurately to a wide reciever on a post, a tightend on a cross, or a back on a deep circle.
Think Michigan 1970-2003.