Outside of the issue with still periodically giving up "big plays", there hasn't been a ton to complain about the defense about for I'd say about the last 5-6 games.
The defense was great against the Dolphins, Bears and Browns, and it was pretty good against Pittsburgh. Good enough to win all four of those games easily (basically held all those opponents to 20 points or less).
They struggled in the first half against Browns #2, but really played well in the second half and kept us in the game.
They get a bit of a pass from me from yesterday for obvious reasons. Still, they were pretty good situationally in certain spots, and they didn't really give up the big play.