Regardless of what you think of him he will be a huge loss. Despite playing for the worst team in the league where an inside 50 is a novelty more than a game plan, and despite playing a reasonable amount of midfield time, he sits 8th on the goal kicking list of players 190cm or shorter, only a goal from being 6th. Often when he is playing midfield, things happen, not because he's a gun midfielder but because he has that pace we sorely lack.
Simply he's not easily replaceable, he's contracted and we need to receive fair to overstated compensation or no deal.
One issue I see is if he does go, and say Rioli went, what happens with our salary cap? Do we pay overs to players for new contracts to get over the minimum payment required or do we trade for a gun young player?