Fabinho replaces Zab as RB, can play inverted RB, replaces Nando in midfield.
Thus, as we've lost both RB's, I imagine Walker is still on the cards, homegrown and would free up Fern from backup FB duties - i.e. if we keep Toure, we don't need another DM.
Mendy is quite like Clichy but stronger, better with the ball at his feet, can pass and cross.
Silva replaces Nolito and is also understudy/long term replacement for Silva, and I think he's much needed competition for the two young wingers (Sane is a bit sulky and Sterling needs to improve technically). He's more suited to the right of a 4-4-2 than either of them. Also competition for KDB, who is still having too many scruffy performances.
I don't see how Alexis does anything for us if Aguero is staying, and the latter looks reinvigorated and there's glimpses of a wonderful partnership with Heyzeus. I'm ruling that out. Plus, in a 4-4-2 we would have loads of options for hole players. Allowing Sanchez to join a big club could mean less competition when we do go for another striker.
I think Pickford has to be of interest as a home grown talent.
The interesting one for me is CB. I guess Kola stays but relying on VK's fitness is a big gamble.