I think he needs *Tactical Dribble, for sure. He is a player to not only hold the ball but he carries between people. He turns. And like said above, he's quick on the ball.
Also, I think he's an AM. I know he plays all over the place and for Argentina it's natural for them to beef up the center of the field, given the 82 strikers they have and Messi, but I think naturally he's an AM. He can play SS and wide in a front 3 or even wide in a 4-4-2 were anyone to play that. For Udinese he's often everywhere, especially last season.
He's damn good tho. Tech needs a raise. Class.