Watching all three yesterday it is easy to see that Grealish, Kovatic and Nunes offer little in the way of goals.
Despite being able to get into decent goal-scoring areas their efforts on goal were pretty poor and without the threat from KDB when fit, it looks a weakness within the team.
Gundogan provided the goal threat which is no longer apparent from the midfield options and I'm not sure how his goals are likely to be replaced.
And whilst not a serious issue against Young Boys, in tighter games against better teams, it could prove to be more decisive .