I don't believe he will stubbornly persist with a plan or formation which is not working. He's changed formations and plans on a number of occasions.
Atm I do not understand his substitution approach /timing or why McAtee not getting a look in. And he is maybe protecting the young players for fear of damaging their confidence .
I believe the real issue is that we clearly do not know the full extent of player fitness/ ability to play with niggles etc. but they cannot be in a great state based upon the performances witnessed.
Player form/confidence isn't factored either as Gundogan looks way off, Gvardiol is making so many unexepected mistakes, Akanji clearly not fit, and Dias apart, the defence is as jumpy as kittens.
The two games per week in the current situation, is adding more pressure on both Pep and the players.