Yes, the profile changes when a coach is fired. But when a coach retires, he is recycled with a new name (same exact edited profile & appearance). The league is eventually 2/3rd's retired coaches who are recycled. This means that edited profiles will still dominate the league. You will need to edit the Patrick Ewings, Jimmy Lynams, Dave Cowens, etc. if they hang on once they replace a fired coach. But, that's easy to do.
I think the Coach Profiles edits are optional, arguable. I don't know how it plays without them and the sliders are being finished in a game w/ edited Coach Profiles.
Yes, the Coach Profile edits are for Assoc or Season Mode.
Sorry, man. I said from the start that this was a selfish venture. I tried to be as unselfish as possible, but there are limits.