What jumped off the screen for me the whole game yesterday was how fast the Packers looked defensively - as others mentioned, there was nothing over the top on them, and they always seemed to have multiple defenders in position to make a tackle on a receiver about to catch a ball. Plus, the front 7 excelled at getting off blocks at the point of attack all game long. Detroit is no slouch at skill positions offensively, and they didnt have any wide open spaces to create easy chunk plays yesterday.
Credit goes to coaching/game planning for sure, but I think alot of it is just the athleticism the Packers can run out on the field in their front 7 + safeties right now - and thats with Parsons in training wheels yesterday. Van Ness lined up all over, and even dropped into some coverage on a few blitz schemes. Cooper and Walker paired with Gary and now Parsons is just chaos for an offense to figure out how to block - and it frees up opportunities for guys like Van Ness and Wyatt to beat 1 on 1s inside.
Last season Detroit toyed with the Packers up front on both sides of the ball - quite the opposite yesterday.