He was ok yesterday but it's true that his talents, while obvious, still don't really translate into much of consequence in a regular game of football.
The problem is that it's hard to see how exactly he will get any better. He won't get faster, he won't get stronger, and he won't change his basic footballing personality, his laid-back, conservative, polite style of play.
The only realistic improvement would be to perk up his off-the-ball running and take more charge of the distribution as a deep lying playmaker. But that won't happen since he's apparently chronically fatigued after playing a few too many games three years ago.