For me, the return for him - in order to even begin to justify the trade - would need to be quite a bit more than the one for Duchene.
You are just not going to get that for a #3D. Duchene has that what if #1C thing going for him.
I do think we should be able to get a top five draft pick for him though. I don't think I'd be looking to trade him for a package. It would be one player, or one high draft pick IMO.
Maybe Edmonton will finally f***ing trade us their pick for him if those tools don't win the draft lottery. (God that is going to piss me off)