@chester
I've seen him play a week ago in a friendly match against Pescara. I know you can't judge a player based on how he performed in one friendly match, but from what I saw, he definitely has some talent.
He substituted Ocampos at the LAM position at the half time and immediately made an impact on the game. He scored the opener himself and later set up another goal for a teammate. Monaco won 2-1 and he got the MoM award. Guy has great dribbling, good first touch, likes to take on the opponents and knows how to trick them very well, but the thing I liked about him the most is his composure. For a guy of his age, he looked really mature with his decisions, controling the game tempo and waiting for other players to make themselves available, instead of going full retard and trying to out-run the whole defence like most youngsters do. This is one feature some players doesn't manage to develop through their entire career and this guy seems to have it already.
I'd say he has great potential, now it's only a matter of time until he fulfils it.