A little of both. Washington's defense is very overrated. Their defensive line has a bunch of high draft picks, but I don't think they play great as a unit. Their defensive backs are really bad, as we saw last night. Denver is Denver.
The offense looks different. The play calling is different. I think Getsy realized that Fields does not do well on throws down the middle. We saw his hesitation to throw the deep ins the first 2 games. They were wide open and he straight up just did not throw them. So these last 2 games has seen a lot of throws to the sidelines. When you have a young QB who is not good at anticipation throws, the last thing you want him to do is to throw it between 3 zones in the middle of the field. There's also been way more designed runs, which is something that was basically non-existent the first 2 weeks and something you have to make the opposing defense at least prepare for. Lastly, they finally started doing the tush push on 3rd/4th and shorts and it worked every time last night. No more stupid Kmet sneaks. No more runs out of shotgun. The lack of execution on those short yardage situations might have cost the Bears at least a game, so it's good they finally adapted to what the whole league has been doing.
The thing is that the upcoming schedule has a lot of bad defenses. So there's a chance Fields comes out of this 4 week stretch with some good numbers.