What? He's a player who still hasn't carved out a definitive position for himself at the age of 23 because he doesn't have all of the right attributes to be a success anywhere. He has some qualities but just break it down for a minute:
Winger: he can cross well, he's pretty athletic but his passing isn't great and neither is his dribbling.
Fullback: Crossing and athleticism, yes. Positioning, nope. Tackling, so-so.
CM: Got the athleticism, not enough of a range of passing, technique isn't good enough.