Well it's obvious that the absence of two players Kelvin Debruyne and Rodi has contributed to their poor performance and this should let Pep Guardiola to know that the team still needs strengthening,
Yes mate I think Manchester city are suffering from extreme injury problems and the match against arsenal exposed how even them can fall without the right players, they are missing Kevin and some players are playing the wrong roles or aren't playing in their natural position.
One of the biggest mistakes they made was to sell some very important players and they didn't improve their midfield
If this is the case, Manchester City's performance in winning matches will be quite shaking until Kelvin De Bruyne returns to the pitch.
The stated time for Kelvin De Bruyne to heal from his hamstring injury is around mid-December. That is 2 months from now if we are to count it from today
I trust Guardiola to do the needful for Manchester City to stay on track in their winning ways before that time. By January Manchester City should sign a new midfield player as a support to the team.