I was a little young when Bud Grant left for Minnesota. I had just really only started following the Bombers a couple of years before & all I knew was he won Grey Cups. I didn't know much about the CFL at that time or Bomber history so his leaving didn't upset me after the 1966 season. However, all Bomber fans at that time older than me were sure sad. But there was nothing they could do.
I do remember Ray Jauch leaving for the USFL's Washington Generals in 1982. He damned well announced he was leaving during the mid point of that season while still coaching here which is the height of arrogance. He became a lame duck coach. Someone who ran out on his city, his team, his players & the fans. All for money. As a fan, I felt angry & betrayed. especially as we were knocking on Grey Cup's door. We had a very, very good football team & Jauch just walked away..... to a last place team in a failing new league. Not a lot of people shed a tear for Ray Jauch after he left. The question became, "How are we going to replace Ray Jauch & with whom???" I'll let you answer that question as all of you should know what happened.
Bottom line is if a coach wants to leave then let him. Just move on.