Ah behold - the red herring.
Ljunberg explicitly stated why he was dropping Ozil - for his petulant attitude after a pathetic display against City.
“At Arsenal that’s not how we behave, and not what we do.” said the Invincible about the wash out.
I presume his decision on pepe, Laca, and doozi were tactical, not behavior based. Ozil’s attitude has been a problem since Wenger, was a problem for Emery, for Ljunberg, for flobaba, and will be a problem for Arteta also.