He's always had the talent to become a world class player but never the mentality. I thought moving to Juventus would help him realize that, by playing in a team that is dominating the league and being comfortable. It looked that as well in his first season, with getting good minutes and winning the favor of the manager, but obviously that changed completely with Sarri coming in.
He would not be my first choice, I don't think he's much better right now than what we have to improve us alot. I'm sure we can get Eriksen for under 30 mil, and that would be a much better signing. If we can get Can for under 30 mil, then it can be acceptable. He will atleast be a very good squad player to have, and atmost he can become a great midfielder, if coached well.