Well, first year Heeney had almost no responsibility and played mainly forward, second year Heeney had some responsibility and played mostly forward with additional mid responsibilities, third year Heeney had glandular fever and fourth year Heeney has spent most of his time in the middle covering for Hanners and working his arse off! When he comes to have a shot at goal, he's pretty exhausted, especially in the earlier rounds while he acclimatised.
Using last weeks game as an example for any of the players is not reason enough to call Heeney one of our 'biggest turnover merchants' imo. There is absolutely no evidence to support that this is true, I've looked. Have you?