I have seen Pep's comment. I disagree. The problem is personnel. We have the same issues as we did in Pep's first season where we can't defend against forwards who run at our defence and that is because we have Fernandinho and Otamendi playing regularly in defence. Stones and Laporte are very capable of doing that but have rarely played. As they return we will get stronger but obviously it will take them some time to reach their best as it did with Mendy. The Palace equaliser started in midfield with Rodri weak in the tackle, and Cancelo out of position. I don't think that's typical of City.
My worry is that Laporte may return and end up partnering Fernandinho because Stones will be out. No one can play properly if they play two games on and then 4 off.
How quick memories fade. Our defence last season was excellent and that was without a specialist left back.