I've re-watched the game now and was struck by how well pretty much every play was executed.
My game ball goes to Josh McDaniels for a game plan that restricted itself to a run-first (almost run-only) offense but still managed to find enough variation to confuse the opponents and keep them off balance. I still can't figure out why the wildcat formation works so well but it did. I also remember the play where Cam faked a handoff to Michel but kept it himself and followed Michel as a lead blocker. Brilliant! (The announcers said it was an improvisation on a busted play -- I'm sure it wasn't.) Other things that were incredibly pleasing on offense included Michel's catch from Stidham on the sidelines (great hands by anyone's standards, let alone a running back who generally only plays on first and second down), Harry's touchdown catch and Cam's up-and-over touchdown sneak.
To my eyes, the defense seemed much closer than it has been to last year: not having a dominant edge rusher but generating pass rush by mixing in blitzes, stunts and doing the unexpected. What a change from being picked apart by quarterbacks who could take their time because the defense was only rushing four (or even three). And the growth we're seeing from Butler, Winovich, Uche, Jennings and even Hall is impressive.
The problems are still there: Cam is limited as a passer and everyone knows it, and the defense still seems vulnerable to a good running attack. But there has been huge progress from the humiliations against the Broncos, San Francisco and Houston.