Watch the Chelsea and other pre-season friendlies. See how many chances they create in each game.
Then compare that with the measly few chances City created in all three last friendlies.
City never look like a sharp threat. They have possession but they still don't look dangerous at all. Yes it's pre-season, but look at Chelsea. Look at Bayern.
Chelsea scored 8 against Indonesia with worse strikers. Why? Because the midfielders created tons of chances for everyone. City can't create a chance for Dzkeo or anyone else. Like two or three shots in 40 minutes? Against a much weaker team? Kind of pathetic.
That is the main reason why we didn't see as many goals and still aren't.
If this was Dzeko playing with the Bosnian team against this bunch, it would have been at least 5-0 or 6-0, and like 30 shots on goal.