Well, I don't think the D was the primary problem (nor was offense for that matter - it was the FG unit), but I was frustrated that we couldn't get stops in the red zone in the first half. It wasn't the D's fault that PSU started two drives in our red zone but you'd like to do better than give up 3 TDs in 3 redzone opportunities, especially to a PSU team that had only scored something like 42% redzone TDs prior to this.
I also don't really understand why it seemed to take us an entire half to figure out that we might want to blitz their QB. Against a freshman QB, that should be the default gameplan. Very few frosh QBs are going to handle the blitz well.