Gifed some moments in the game. Besides poor touch, two areas he also needs to work on are: shooting (range) and decision-making.
In the 2nd and 4th cases he could take a shot directly (though both would be tough try) but he chose to stop the ball.
In the 1st and 3rd cases the first touches ain't that bad. He then tried to hold the ball but his rate were a bit slow to support his following moves. It might be too much to ask but in both cases a backpass to Rabiot may create a better chance.
I think these things are related. He is probably not very confident with his shooting ability so he needs to make more adjustments before taking a shot. And it causes hesitation which leads to poor decision.
On the other hand, he needs to learn to read the situation well before receiving the ball, e.g. where his teammates are, how many defenders are around him, so as to know whether to hold, to dribble or to make one-touch pass. If AM is his natural position then quick and wise decision-making is the most important quality.
Anyway he's only 19 and these weaknesses are to be expected, just keep fielding him and we'll see the improvement. For now it seems to be more a confidence thing than a technical one. Like
@Boksic said, a goal will help the kid.