My Watford mate says he's good in the air. There's some headed goals in his highlights reel. The negative is a tendency to hold onto the ball for too long when dribbling.
He can play in the 10 role behind Evan but also in rotation with Evan when necessary. Effectively, a Welbeck replacement with (hopefully) extra #10 vibes.
My Watford supporting mate says:-
"He has played in all positions. Very versatile! Brave in the air and has quick feet. He runs a bit too much with the ball but can beat people with ease. I think he is more of a 10 than anything. Might lack a bit of pace with the Prem boys!"