Kragthorpe and Studrawa were co-OCs and look at the very inadequate results they obtained, especially in the red zone. After just 5 games, Cam Cameron has disproved the adage that "two heads are better than one."
I don't know how much of a fair shot Kragthorpe got due to his illness. And I can't really say I have a lot of confidence in Studrawa. There was a point in time where quite a few o-line guys were being drafted and making an impact in the NFL. Since Studrawa I don't recall any.
Les is slow to fire his assistants. But I wonder if Studrawa, Ensminger, and Raymond aren't replaceable. I've seen a lot of underperformance from the players they coach. Nick was very rough on assistant coaches and 2 or 3 left in disgust or got fired every year . . . but Nick upgraded each time.