I think the theory of him as a winger was that he could drift forward and cause damage on an mis match. It actually makes sense and sometimes looked like it would work - but it hasn’t often enough in my view for them to persist. Issue for me is that he has been less effective I think in the centre square as a midfielder to…so where to we put him?I agree that's dropped off, and that we're worse for it. But I was more saying that I think spending more time in the ruck rather than less is something I'd be exploring as an option to get the best out of him. You're right that he was never a huge ball winner. And I agree he isn't good enough to be an inside mid currently. But getting 15-20 disposals is not acceptable if you're primarily a midfielder, but as a ruck that's totally fine.
He get's beaten as a ruck in centre bounces (although he's ok at neutralising, but not winning these contests). But around the ground he has a clear advantage over most rucks which is what I'd be trying to exploit. I worry playing him as a winger means he's just a slightly less good version than his opponent for the most of the game.
I like him in the Ruck but should he be full time? I suppose I just asked the same question you did!