I think you are looking at the stats and seeing what you want to see, this defense has struggled the entire year getting off the field, very true agains the better teams. Against a team that has poor QB play it looks great, but when they play anyone with a pulse, it gets chewed up. We beat TCU because they were driving and fumbled the ball and the punt return for the TD. Did the defense play bad, no, but they were not getting off the field with a lot of 3 and outs either. What is strange to me about the defense is that it was set up to stop the passing attacks we face and does a horrible job against them, while you would think it would be easy to run against, and that is where we excel, most of the time.
The offense is a whole different matter, dropped passes and poor throws are its biggest problems, throw in predictable play calls and it has been none existent at times. The offense has not been nearly as good as many of us hoped with what we had returning, and Rocco has not improved enough to cover up the mistakes of the rest of the offense.