I believe that is why we drafted Lohmann a couple of years ago, with the view as a potential successor to Zorko.Zorko will get his year if he wants due to his service to the club. However if you are not going forward in this game then you are going backwards so we should be planning the phase out from round one.
Nothing wrong with a bit of list turnover to keep things fresh.
Looking to the future, we have Sam Marshall and Levi Ashcroft in next years draft.
Levi is sort of a cross between Will and Zorko.
Marshall is a bit more skilled/polished, but similar to Dev. Can play wing in a pinch as well.