He won't leave UAE because he's treated like a god there, and if he goes to europe, he'll get a much smaller pay while being a squad player for an mediocre team.
Mate, you're really underestimating him. I don't even like the guy, but he manhandles and destroyes most of the defenses. What I find so extremely impressive is his passing accuracy. For instance against us he had an assist where the pass was so on point the UAE striker didn't have to control the ball and could shoot on the first touch. The man has amazing vision and passing. I honestly think that there is a huge powergap between him and the second best players in Asia right now. The likes of Kagawa, Honda, Okazaki and Son are far beneath him even though they're great players.