You could very well be onto something there.
I could see more reason for Murphy to be upset than Dunkley tbh.
Murphy wanting to coach out the team who had basically lost everything before they die out. As opposed to an ex player cracking the s**ts because he isn't offered a coaching role after retiring. Dunkleys is even more comical when he says that he won't go to an reunions at Sydney because he doesn't want to leave his kids. I mean ffs your kids are ADULTS and you would be gone for one night!
That attitude from Dunkley is probably why he wasn't offered a coaching role!
I'm sure that Murphy wanted to coach Fitzroy because he loved the club and wanted to help them in their time of need.
I also wouldn't be surprised if he wasn't a fan of the merger.