I think he'll be really popular when he's promoted to the first team because he's fiery and extremely skillful, but in terms of becoming a top professional footballer he's got a lot to work on.
People already know about his temperament, but my biggest concern about him are:
- His tracking of runners in midfield
- General workrate and application
- Too many touches before releasing the ball
- Static standing posture while receiving the ball meaning he needs to do a skill to progress the ball / leaving him open to the foul (a bit Martial-esque in that regard).
In short, he needs to learn and apply the defensive side of the game and how to play on the half turn and release the ball quicker, in my opinion.
Otherwise he will be in the Pogba style limbo of not being clever enough in tight spaces for the 10 role, not being safe enough for a deeper role, and not being quite quick enough for a wider role long term at the highest levels.