Guardiola's main strength is that his bench team is very strong. Manchester City have a number of talented players on the bench. Due to this, Manchester City does not face much problem if any player in the squad is injured. Because they have qualified replacements. Other teams in the Premier League do not have this. The bond between Arsenal players is strong. Their squad is strong. But the bench players are not talented enough. And so when key players in the squad get injured, Arsenal's performance deteriorates. Without three key players in the team's midfield, it is absolutely commendable that Manchester City is performing the way it is. This team is performing quite well. Still their performance is stable.
Yes, that is Pep Guardiola skill in recruiting players where the players he has recruited have become an important layer for them when rotation is needed because his backup players are able to make a big contribution to close the gap when their core players are injured.
Alright, most likely this will also have a big impact on their might in the Champions League this season. I think Pep Guardiola also needs to anticipate quickly to immediately look for new players in this transfer window in order to maintain their chances when they face a busy schedule.
The depth of squad that Guardiola has is very capable, the core players with reserve players have almost the same quality. He also still has adequate stock of players in the midfield position, in my opinion he will rely on players who are already in his squad rather than having to look for other players.
De Bruyne injury is certainly not good news for Manchester City, but Guardiola has anticipated the vacancy in the position De Bruyne usually occupies with the players he currently has. De Bruyne departure is only temporary, he will return soon when his condition is ready to play 100%. Currently Guardiola will try to close the hole left by De Bruyne by rotating players in order to maintain the balance of the team's appearance.