Too early to call really. He looks like any other 'decent' prospect would, given the dearth of opportunity so far - ring-rusty and playing it all very safe. He'll be ok given a good run.
I would have loved to see a couple of shots fired off though yesterday. Two or three times the ball arrived at his feet round the edge of the box and Aquilani appeared to favour the lay off to someone else. Like others have intimated, a bit more assertion would serve him well. Of course, as confidence grows.....etc
Thing is, how do you GAIN confidence? By playing games right.
This is a chance to bag some vital minutes with the team with Mascherano suspended - time to step up Mr Aquilani. Don't waste it.