I remember first half of 16/17 Mario was really really poor, ship to China kind of poor. Abd then he was reinvented at the 2nd half of season and had arguably his best time with us that same season. I wouldnt bet on that exact scenario happening with Berna, but its always good to remind yourself that form is temporary
Either convert him to a B2B or just move him back to a winger position.
CAM is the worst possible place because the guy stuggles in tight places with his back to the goal. Being strongly left-footed doesn't help either.
Sarri has been given a lot of bs complaining for starting him over Costa and Ramsey but it turns out they always have some physical problems, so he knows neither can handle 90, or even 60 mins of every game. Not when playing every 3 days anyway.