I agree to an extent that he's not as effective as he could be at the minute, but you can't ignore that he dragged the entire team through a full month and was the leagues top assist maker, that's pretty damn good for somebody who didn't play a full season. There's a few things about his game which I think COULD improve but they don't need to. The main one is after his first touch he spends 5 seconds getting the ball onto his left foot!
You'll never be able to take that instinct out of him tho. What makes him deadly is his ability to turn a man inside out onto his left foot then fire a shot into the bottom corner of the net. You dont wanna be telling him any different tbh! Let him do his stuff.