I always wonder about the "he's going because he's upset about a particular administrator/coach" lines. How does he know where he's going it won't be worse? If he goes he's going to be roundly criticised by MFC supporters, the media and the general footy public, probably, and abused for his whole playing career. That seems like a large cost to pay to solve a petty issue.
As RR rightly(!) said, if he leaves it will be a business decision, not because of some trivial thing he's cracked the sads over.