I'll be very surprised if we do anymore business now. I don't think anyone will leave and we'll go with what we have and look again next season.
It may prove to be a mistake not signing a striker and may well cost us the title this season, but City are not panic buyers. The board will do what they feel is right for the club. It may take 12 months but we will find the Aguero replacement eventually and no doubt whoever it is will be fantastic for us.
As for this year, Grealish is quality and adds to our options in midfield / out wide. That could leave us to play a number of people as the false 9 or we could take a risk and put Torres / Delap up front more often, but we still have plenty of options. Either way we have a great squad still and plenty of players who can score 10-15 goals so we will be fine.
I'm disappointed we've not got Kane, a top striker would've been the icing on the cake, but £150m + for a 28 year old are mad numbers, so I'm not surprised we've walked. I think the mooted £125m was a fair offer so more fool Daniel Levy if he has turned that down.