Arsenal lost? Is Arteta ready to do something sensible with his right-side of midfield?

Or is he going to keep being stubborn like he was when he was benching Ceballos?

Pepe should stop playing on the right. He's distorting the entire team from there.

Pepe on the right only works when you plan to counterattack.
If you will have possession, he stifles buildup and attacks.

Move him to the left and Arsenal can make Top4.

If Arteta still played 2 CFs last night then he should stop it immediately.

It's a stupid idea.

How often do you see a cross or shot from the right flank of Arsenal?

Even when Arsenal win the ball, they usually avoid using the right flank to build up because Pepe always turns back and passes the ball back.

This chokes the midfield& makes Arsenal over-reliant on the Left

Notice how much more fluid Arsenal's left side is.
Left-footed Xhaka connecting with left-footed Saka.

All a smart coach has to focus on is choking Arsenal's Left Side.
It would make Arsenal struggle in midfield and eventually become defensively vulnerable.