I believe what basically happened was that after half a season, it was determined that Jaran Kanak's inexperience at linebacker was hurting the defense. He was an athete with little experience at any position on defense. Kip Lewis had been making plays, especially on the goal line defense. So they gave him a shot. And he still made some plays. But almost instantly, BV started talking about the problem with fits on the defense, mostly at linebacker.
Now that was close to the same time when Stutsman missed a game and a half on defense. But it seems like the fit problem had a lot to do with Lewis. His instincts are way better than Kanak's. But as a freshman, he was not close to mastering what the position requires in BV's complex defense. A reminder, this was a similar complaint that we heard over a decade ago, when Brent left. That his defense was so complicated, that defenders had problems going full speed.
This defense can work grandly. In 2004, the defense worked so well, that we gave Texas last loss, before a 21-games win streak en route to the 2005 national championship keyed by the overwhelming play of Vince Young. And that was a 12-0 shutout of the Horns.
But eight games later, was the most embarrassing loss of the 21st century. Remember 55-19? I've tried to forget. BV's defense is the kind of defense with which you can can win national championships. But the players have to understand the complexities. It takes time. Now one of the things it takes is an LB coach who can teach these guys the defense completely. BV was great at that at Clemson. And they built a collection of great defensive talent to pull it off.
I don't know if Roof can be that guy. If he's not, BV has so difficult decisions to make. He knows a whole lot more about what it takes than any of us do. But finding the right guy, if it's not Roof, would set us back a coupla more seasons, I suspect.