We've all seen how the AFL manipulates the rules to force their view on what they want for a club - e.g. Sydney's trade restrictions, Swan's COLA yet Brisbane doesn't. GWS COLA, yet Gold Coast doesn't get one, etc.
If Dixon in particular were to leave the Suns via the PSD, you can get your house that the AFL will step in to protect their precious Suns from being stuffed over, then implement some random arbitrary rule only applicable to one club rather than a blanket rule for all.
I've always thought that players have far too much control while under contract, and a player who isn't a free agent refusing to sign a new deal, only to go to the PSD to get picked up by a club of their choice is total BS. The AFL needs to do something about it. That, and players demanding a trade to a particular club (e.g. Beams, Griffen) while under contract.