Haven't read last 10 pages (seems there's mostly jamtalk(aye) there), just wanted to say one thing. He's very mediocre an pain to watch 90% of the time. It's good that he can compensate that with some crucial goals and assists here and there, but those mostly happen, when he has lots of space either on flank to give a sharp cross or can blast it down the middle, when nobody is challenging him.
He's overall creative ability is almost zero. Can't dribble at all. At best he can beat a single defender, when there's no backup and even that is 50/50, when he's in good form. Can't link up as he has no technique in tight spaces, shabby first touch and cannot into one touch passing. Even prepared passes are often miscued badly. He makes lot of body movement that has no effect and makes him loose the ball, often even without being tackled, just because he lets ball to far or in wrong direction. Also bad decision making.
His usefulness really hinges on being very active, having work rate that sometimes helps defense and until now, being somewhat clutch in la liga games against minnows. Don't hate him, but hard to like either.