I totally agree with @blueparrot .
That's why I am sure Sanchez was the 5th forward to be added in summer and since it didn't happen Bernardo has to help covering Raz instead of covering Silva and KDB. Pep had to change his plans.
Bernardo Silva said he'd be palying on the left and right wing the day he signed for us, on the 26th May. So the idea he only plays there because the Sanchez deal fell through is something you've just made up.
Defensive players don't have the same intensity and mental pressure as forwards, that's not rocket science. We have many great defending teams in PL and even lower leagues. Our game is outstanding and dominating through our creative elements.
Therefore it's key to have fresh players in the creative part of our game. Fresh legs and fresh head. We will always see more rotation in our forward department compared to our defence, where we want to see stability.
Thus I don't really get why so many think we are overloaded upfront, even now.
Sorry but I think that's complete and utter bullshit, it really is. Defending with another 10 players on the edge of your own box is not hugely mentally taxing,no. Defending for Guardiola is a completely different thing altogether and incredibly mentally and physically taxing, Pep has said as much himself.
They are defending half the pitch between 3 of them mostly, they are taking on the very mentally taxing operation of playing out through the press, knowing any mistake likely leads to a goal and actually if you hadn't noticed, they are key to our attack through creative passing from deep without which we create nothing, see Wolves when we had a full strength attack getting nowhere because Otamendi, Stones and Fernandinho didn't play.
If you think they aren't working as hard mentally as the forwards I don't know what team you've been watching. No pressure on the defenders, you cannot be serious??!