Bohls is 62 and probably only has a few more years in the game; taking a pay cut is pretty convincing to me that the idea is for Polasek to take over the HC job at an FBS school.
Polasek is pretty outspoken. He's not shy. I can only imagine the number of times he's stepped into the football complex and run right into Brian Ferentz's ego...and Brian's exercising of authority. I have no concrete knowledge of this...but it's speculation...and just a hunch.