I've been saying this since this time last year. He doesn't even have that one redeeming element to his game as a strength - i.e. passing, tackling, positioning, ability to control a midfield, goalscoring. He can do a all of these to an average extent, but he's not great at anything really.
The other problem is that I don't think he's a midfielder. He spent most of his time at Newcastle playing on the wing or behind the striker. We rather stupidly bought him in this hope that he could transition into a number 8 - i.e. the heartbeat of the side. He hasn't. I know from my own personal experience when I played back in the day - I spent years as a forward or left winger. When I tried to play central midfield, the game passed me by completely. The way you approach the game is flipped on its head.