for all the trade Marner talk, I'm pretty sure his ice time and responsibility will actually go UP under Berube.
I doubt he will be traded unless HE asks for it.
Any coach would want Marner and his 200 foot all situation ability.
In the playoffs he was smothered after looking for someone to pass to, and, finding nobody open ever (coaching issue more than anything, as Matthews/Nylander know how to get open but Bert was useless).
Marner just needs to be instructed to just drive the play himself and stop looking for a pass.
Once he becomes more selfish with the puck, he will become a much more dangerous player (like McDavid after losing the Hart to Matthews, he decided to just shoot the puck himself and take it to the net on his own, rather than pass all the time...no idea why he stopped this season).