Gazza M you’re joking, right? Did you watch the pre-season? When Saka was still recovering from Euros and Arteta could choose amongst ESR, Nelson, Vieira and Nwaneri at right wing, who was his first choice? He could’ve kept one or more of those other guys. He got rid of them and backed Nwaneri in the rotation.
This is the most obvious thing and trying to act like a manager who has spent the last two years working with this player and is now suddenly surprised by him is inaccurate.