Tam agree it's early but we should have been rotating anyway. 3-0 up against Coventry just bring Gyokores get havertz some rest.. Things like that suggest to me he stubbornly sticks to almost the same 11 and only when forced with injury or really disastrous outcomes tries to change it. He's nowhere near proactive enough.
I read on the Arseblog yesterday that in his post game comments Arteta said he could see something was wrong with the team 5 minutes in. Now maybe he's trying to be clever after the fact but if you believe him then why is he not looking to change things sooner rather then just leave it and does he sometimes give to much benefit if the doubt to his core team in a way he wouldn't for those outside.
Either way saying you can see something is wrong within 5 minutes and doing nothing about it is not good management.