What current OC at a MAC school would want to come to a Big10 school with a lot of returning talent and try to show that he can put a pulse into KF's offense with a little creativity in design and playcalling? I am guessing many.
Remember, these coaches are not exactly humble men. Most of them aspire to climb the ladder and all of them think they can do it better than the guy before them. I suspect there would be a lot of interest in the Iowa OC position if it came open. Maybe not household names, but a young and inventive coach needing a chance.
And remember, the 3 OCs KF has had are his best friend, his kid and a fucking carnival clown. Maybe a fresh young mind can figure out a way to run KF's offense better with some reasonable tweaks. Wisconsin's offense doesn't suck most years......