I haven't read much on here so apologies if this has already been posted, but I think there are a number of reasons Ty moved on. 1. There was an obvious divide between him and coach Stitt. 2. It's rumored Kandice was offered a coaching job in Bozeman. 3. If I'm a defensive coordinator who is trying to move up the ranks, I would hate to coach in a quick strike type of system where the defense if on the field for a huge majority of the game. UM's defense was very good this year, but I believe they would have been absolutely dominant in a "bobbyball" type of environment where the players were actually able to get some rest.
As it stands, I don't think this situation is much different than if Cramsey were retained by Choate. Both are big firery personalities who the players love and I think Cramsey would have been looking to jump ship ASAP.
That said, leaving UM and going to MSU is a big giant middle finger of epic proportions.
P.S. I haven't seen anyone manipulate Gregorak's name yet, and I have to say I'm a little disappointed in CDA and Everett. May I suggest Todd Gregorcat?