In the 2018/9 super bowl, last of the New England dynasty, they beat the rams and the Rams were like 1 or 2 of 12+ on third down. The Rams had a nearly equal o to what they have now, Goff instead of staffy, prime cupp, complimentary guys, and a sick ol and power backs. They had just monsters on d, Donald and suh in the gut was like a Godzilla King Kong team up.
Bill cheater figured he had no answer to the stretch zone and play action system w all the rollouts and cutbacks with his usual d, so he went big nickel and put on a bear front (kinda like what Baltimore did vs us). McVey had no answer and the pats stole one.
MCD has occasionally shown a change up, usually it means disguising coverage out of similar formations, the odd zone blitz/rush, or totally selling out to stop either the pass or the run. The wind tunnel game vs Baltimore was the only playoff win where a move against type showed up on D. If he doesn't show he can make something happen this playoff, then any argument that he's not a happy clappy schottenheimer is DOA.
He strikes me as a guy who lets the perfect be the enemy of the good, not with respect to risking it all to get those last 5% points of improvement, but based on his mental map of what an unacceptable mistake is. 13 seconds and AJ Kline starting over Williams (who when healthy has been about our best lb all season) shows to me he'd much rather lose whole not allowing a change that risks a deep pass completion than win and make a change.