I ' ve seen at least 30 games of him in the last 2 years, i mostly agree with your caracterization , but i don't see the potencial.
Physically his quite good for his size, the stamina too, i don't see him getting much better, on the air the same, small with good timing but i can't see him getting better than this.
He is a not that great dribbler in tight spaces and his passing his good/average, the high% in passes his because he doesn't do much progressive passes.
He is not like Renato Sanches or even Matheus Nunes going forward and not creative enough to a become an excelent MC or AM.
Just because his 20 it doesn't mean that he will get better in every aspect.
He is good, not great and in my personnal opinion i dont seem getting there, he is like Moutinho a good player very mature since a younger age.
Coming here, i would expect him to be the flop of the year. ("a bit of everything, not great at anything")