I think this may just happen.
He massively adjusted his game towards the end of last season but he's still innately not a Pep player, and given today's market if we can squeeze £70-80m out of Chelsea and bring in Sanchez plus fund more defensive acquisitions this will happen.
Given the amount of attacking midfielders compared to strikers we have Jesus and Aguero won't be starting together regularly, and we know which one Pep prefers out of the two.
The cold-blooded move is to sell why he's still considered hot.