I get what you're saying, but against Arsenal I felt like our shape was all wrong, just to accommodate Pogba.
That's what's been bugging me lately. Why all the clamour and fanfare of 'Pogba has to play' and 'we need to fit him in the squad' when he's not really playing that well.
I think people are getting fed up of the soap opera around him. We needed 3 up top against Arsenal against their back 5, we needed some width in our play. There was no need to play a diamond, yet we did.
In reality, two of McTominay/Fred/Matic provide a balanced platform for Bruno and the front three to attack. Throwing Pogba into the mix just made us look out of shape. Even Ole's subs, I would have left Greenwood on, brought on Cavani, VDB and Matic for Pogba, McTominay and Fred, and gone 433. Why did we need McTominay and Matic in those latter stages? Why did Bruno come off and Pogba stay on? So many questions.
But you're right, he's not the root cause of all our problems. However, we did play a formation to accommodate Pogba and Bruno together, only for it to fail and Pogba to give away a stupid penalty. It leaves a sour taste in the mouth.