With Abraham and Giroud performing very well I think Werner will continue to play more as a LW. With Pulisic back to his last season form hopefully, it will be again a problem for CHO. I think he is also much better as LW.
So with moving from 4-2-3-1 to 4-3-3 we kind of lack depth in number 8 position because Kante, Jorginho and Gilmour are all only for deeper role. I know Kante played there but is it worth it?
So I am thinking Ziyech can move to number 8 sometimes, he can definitely play that role and open RW spot for CHO/Pulisic.