I'll add on to this. We're 4-0-0 with Sane/GJ/Sterling starting with an aggregate score of 14-1 (to be fair it's palace twice, swansea, and west ham). I'm far more confident when hes starting honestly. Interesting decisions coming for Pep if Kun is fit for the remaining three games.
I think there's two possibilities.
Either (a) Aguero just doesn't bring others into play well enough or (b) When Sergio Aguero, goal machine isn't on the pitch, the others take on more of the goalscoring responsibilities.
I think the only way to find out is for him to be out of the team for a while and maybe this is the opportunity for that.