use of motions and pre-snap chaos can create confusion and mismatches for his base offensive sets and plays to run against.
He essentially uses the motions and looks to move defenders where he wants them (or away from where he doesn’t want them) and because he’s simply moving guys he practices with in the scheme of his normal offense, there’s no real added risk of a guy without reps blowing a big assignment.
It’s fun to watch and and I think that a team like BYU could employ more of those principles to gain some advantages if the basic execution of the play is there to begin with. If they suck executing, it’d just appear to be an overly confusing way to suck.