Needs to work on his composure when he's being pressed. That part of his game is still deficient in my opinion, and it comes down to not seeing the passing option quick enough, and also not being able to shield the ball, dribble a player or having an impeccable close control in general, like Iniesta and Busi both have. All those things would allow him to retain the ball under pressure until these passing option become available to him, but the way I see it he lacks the specific skill set to be a ball carrier at Barcelona, sort of like Cesc tbh. That's why I think he doesn't look great on the ball against an opponent that can press our midfielders and cut their thinking time in half. Probably why we look to put Alves on the ball more in those games, and give Rakitic more off the ball duties, like covering and even exploiting spaces in the other team's defensive lines (which makes him a very important tactical player both defensively and offensively, because the opponent doesn't see him as a legit danger, or someone that needs to be closed down as soon as possible).