John Budmayr is on staff, past QBs coach at Wisc., past QB at Wisc., and past offensive coordinator at Colorado State. He is an analyst, and not a coach. I don't know what that position entails but I suspect it means he can't be on the practice field.
It would be a very simple midseason adjustment to promote Budmayr to QB coach and Offensive Coordinator, and terminate Brian Ferentz.
If the offense improves then keep Budmayr; if not hire Scott Frost as offensive coordinator and QB coach for next season, and make sure he knows that the Iowa way is ball security, and that you do not give up 3 turnovers a game as was done in the Iowa State game. Nebraska's offense scored quite a bit under him; it was the turnovers, lack of defense, and underperforming special teams that were the troubles for him at Nebraska.