You may disagree with how I look at this. So, I'll use an analogy.
Let's jump back to '90 when Emmitt came to town and ran all over Bama. Why weren't there any second half adjustments? Emmitt, like other schools, had Bama's number that day.
I don't believe, for one second, the breakdowns weren't addressed. I also believe, much like the QB, there were times some players just blinked out on defense.
Defense, from the staff on the sidelines (sans one) really doesn't concern me. I know what's returning in that front seven and have a good idea on the back (just not how they'll run that rotation: it'll be quite a few.) It's all about keeping them off the board, right? I believe they'll be better this fall and they were pretty sporty on scoring defense last season.