That’s EXACTLY what Belichick was talking about in one of his recent videos (w/ Chad Johnson, Chris Long, and Ryan Clark). They basis is everything runs of the stretch zone run and QB bootlegs. Been that way since Elway and it STILL WORKS!!!!!
The Shanahan method is predicated on low base, strong o-linemen who can move in space. That allows them to spread the field width wise.
Their key, they can open any gap and protect any part of the field beyond the hashes so that puts extra pressure on the defence to watch where the block is coming from, and to keep running because they will pressure the entire width to execute a play.
Once you buy into the motion and make your player the key, then they fake the heck out of the motion and you are running after a ghost.
Mobile linemen, motion, misdirection and width to stress the least intelligent and poorest technique players you have on the field.