I think when fit and playing well he's excellent. I alsothink he was a great signing and has been good for the club.
However, I also think he's become an absolute liability this season, throughout his time here he's consistently sat out injured, often when we've needed him most. This has also led to an unsettled back line as when fit we couldn't afford to leave him out but when injured we had to adjust and couldn't.
The nail in the coffin is saying he's looking to go onto bigger and better things.
The only thing that's held him back whilst playing for us is himself, he was a premier league player, our captain, he's now known by most football fans, he's played consistently for his country including a world cup semi final. If he moves he'll be able to achieve, at most, the same, almost definitely less, all whilst continuing to be injury prone