Mikel has improved his discipline enormously. I used to be worried that every game he would get booked, but the past 2 seasons he has been a lot, lot better, it's no longer an issue with him.
He isn't poor on the ball, it still baffles me how people think that he isn't good technically. He doesn't give the ball away that much sometimes he will get mixed up with others, but that's lack of communication and concentration, which are things he needs to improve. But when he wins the ball back, he's as strong as an ox, shields the ball and then gets rid of any danger, usually. He rarely gives the ball away with his passing. I'm not sure about at the end of the season, but midway he had the best passing accuracy in the PL in the past 3 years. I know you will say it's because he passes it sideways and backwards, but that's the job he's been given to do under the past managers. When he does play it forward he is one of the best passers in the PL. I fully believe that AVB will give him a lot more freedom next season if he plays and you will see a lot more forward-passing from Mikel.