Of course but they have been in the middle of Champions League games, international week etc. In the real world you fly for a month or two if you are lucky and grind most of the games out because you're inevitably playing below par.
The problem City have is that we concede too many soft goals so cheaply against teams that offer very little and we don't quite have the goals potential we used to. Players like Sterling, and maybe Gabriel Jesus have to up their goal output, because we're very reliant on 2-3 players for goals. Much more so than we have in the past. I haven't checked that out, but it's my feeling that Aguero and De Bruyne are getting the lion share of our goals at the moment when 3-4 years ago we had nasri, Toure, Aguero, Dzeko, Balotelli, quite a few goal scorers. It was very difficult to stop City from scoring. Now our no. of mathc-winners is much reduced. We have very creative players, but visiting teams come to City now, stick 2 central defenders on Aguero and we struggle.