I don't think a massive clear out is happening, or required, but there are going to be holes in the squad which need to be filled.
Moon and hall are leaving
I think JJB and Delaney are leaving
I reckon Ablett will get another year.
It's true everyone is underperforming, but assuming we get through the middle 8s we have a whole off season to implement the new way of playing, and anmoynce / sign some players.
Given the above people leaving I'd imagine than plans have been made to fill for JJB and Delaney. Hetherington never announces signings early.
Changes need to made, but I can't see anyone with a contract being moved on, it makes no salary cap sense.