Simply having a player who can receive the ball on the half turn from the defence, then either carry it forward or find an attacker with a central pass, is bound make an outsized impact, given the complete lack of players who can do that in the squad right now. So irrespective of exactly how good he ends up being, his style of play will get him plenty of opportunities this season.
One thing though, is that physically he's still quite slight. No criticism there when he's aged 18, and from the look of his frame he look's like he'll fill out fine. But he's not going to be playing 3 times a week til the end of the season, even if his form is excellent. So ETH needs to figure out the best way to use him.