Most of our "star power" at the rush positions is still very young (like, true freshmen young). The difference this year is no Van Noy. Not having Kaufusi is also hurting. We're blitzing, but not getting all the way to the QB. And, our coverage is just a bit too soft behind those blitzes.
Having said that, our defense has been pretty good this season. Today was a bigger break-down, and I'm sure the coaches will go to work fixing things.