Based on this season I think we should face this transfer market with everything we've got:
Ederson/ NEW GK (another sweeper keeper like Eddie, who's willing to only play in cup games for now but who can keep the brazilian on his toes)
Walker/ Cancelo (we're all set here, but should start to look for options next season)
UPAMECANO/ Stones / Harwood-Bellis (I'd rather spend 80M on Upamecano than 70M on Koulibaly, Stones would be a decent back-up)
Laporte/ Aké (all set here)
ALABA/ Mendy/ Zinchenko (Alaba is a must, Mendy is great when fit and Zinchenko is a great utility player that never causes trouble in the dressing room and can play in 3 or 4 different roles)
Rodri/ RUBEN NEVES / Tommy Doyle (Fernandinho should be moved either now or in January to Brazil, a De Jong-type DM should be signed; Kimmich would be perfect, but rather improbable)
De Bruyne/ THIAGO (Gundogan out, a new one is needed; I don't know if Aouar is the best option, I'd rather sign Thiago in the meantime)
Bernardo/ Foden (all set on left-footed CMs, David Silva is out as we know)
Mahrez / Sterling/ Torres / NEW WINGER (I have no clue who else we could sign, but it'd always be expensive: Sancho, Coman, Gnabry, Bailey...)
Aguero/ Jesus/ MBAPPÉ (Aguero should play his last season this year, Jesus is great in more ways than one, Mbappé is also a must; spend big on this kid, plus he can play on the wings)
We should spend big if needed, but not stupidly. I think we can all agree that players like van Dijk, Jorginho and De Jong (all of which we failed to sign) would've been quite useful this season.
I honestly hope Pep stays since the only other coach I could imagine replacing him is Naggelsman, who might be too unexperienced (outside of Germany) for us.
I think should, every three years, spend big money. Last two seasons we only signed Mahrez, Cancelo and Rodri and the aging squad is starting to show. Waiting until now to replace Bravo, Kompany, Fernandinho, David Silva and Aguero has proven to be a big mistake.