Signing Çan would instantly improve the squad by his good looks alone. My god these bunch aren't a looker.
He's someone like Doucoure, has decent strength, pace, skills, and shooting with penchant of the spectaculars every now and then. 6 goals 4 assist a season kind of midfielder. Talented eventhough not a top bracket. Main complaint from Pool's fans are largely his dallying on the ball, slowing down the tempo unnecesarily.
He's clearly has self-confidence in abundance, that's why he moved to Juve. It's true that he ran down his contract at Pool but he remained professional on and off the field. No throwing toys out of pram when he didn't get the contract he wants.
His fitness record doesn't seem too solid but not disqualifying either. A loan with option to buy would be the best option. He's 25 now, he needs a place to settle down and hopefully hitting his peak. United can do so much worse than him.