This "3 years" narrative is not real, though. We spend a lot of energy talking shit on our rivals, but that's not necessarily representative.
I also doubt we'd play him as a CF, but I could be wrong. He's probably wasted there, might be better in deeper positions, could see him owning the Xhaka lane straight up and down the pitch.
One thing I'm pretty unsure about is his stamina. Can tractor up and down the pitch all day?
Edit: watching more, he's really all about understanding space, very intelligent in that way and he could thrive in Arteta's positional play.