Chelsea need to be much more active in the transfer market now. They even need to be the most active team among the top teams of the league. Because they have parted ways with many players in this transfer window. They will need to replace them with solid alternatives as soon as possible. They are in a rebuilding process in short.
Pochettino has a big responsibility to carry this team to the place where they need to be. Chelsea wouldn't target the league title for now of course. The first step will be to finish a season in top 4. They still need time to be able to fight for bigger goals after leaving a poor season behind.
Of course Pochettino has a very tough task and it also seems like it will take time for him to rebuild Chelsea from a slump, at least they can qualify for the top 4 next season because it will definitely be full of competition next season, many clubs are spending on players as well as making the competition even tougher this season. forward, Chelsea need good players to fill their midfield and front line because I saw Chelsea's attack power which was not really good last season.
I think Pochettino will fill the void of players who have left Chelsea in their first-team squad and the most important thing is young players or players who really contribute well so that they don't spend too much money buying expensive players but they don't work well,