Haven't strengthened?
We broke the British transfer record and signed a top class midfielder FFS!
Midfield wasn't a position we were struggling in - at least from an attacking sense. Likewise on the wings, where Grealish can also play. We needed someone to convert chances, that's where our weakness has been most prevalent.
It's been blindingly obvious that number 9 was the position that needs sorting for 2 seasons now and the board have failed to correct it (despite huge funds at our disposal) and in the process let Aguero leave. We're now left with a number 9 that wants to play as a winger (Jesus), a winger that Pep wants to play as a 9 (Torres) and a very talented academy striker (Delap), that Pep won't play in favour of the former.
I'm sure we will manage this season, but we have let our rivals catch up whilst we have effectively stood still and failed to sign someone for the actual gaping whole in our squad.