He is too weak, need to bulk up. He also have no power when dribbling and that is a huge problem in this league. A bit like Walcott, powderpuff. You look at someone like Bergwin, he has pace and power to burn and it makes a big difference in this league.
That said, he have many good points in his game especially his right foot. Extremely skillful in unorthodox dribbling. I don't think he is worth 72m personally even though his stats is still pretty decent this season. For 40m everyone will be very happy. Bayern's reservation about him was very valid, he is a pure counter attacking player which meant he was very impressive at Anfield when we played that way but needs a lot of work in a possession based team.