Chelsea also made a hasty decision in my opinion, especially about selling important players. Mason Mount was one of the most important players for Chelsea in recent seasons, Kai Havertz too, but they sold him to Manchester United and Arsenal instead. Admittedly I was pleased when Manchester United managed to sign Mason Mount, but it was a big loss for Pochettino who was hoping for more good depth to his squad.
I will not be completely sure Pochettino will succeed in building Chelsea as quickly as expected, that's because he and some players need adaptation. Next season it is clear that there will be many opportunities for players like Mykhailo Mudryk and several other new players, so of course they need time and adjustments to the strategy from their new coach.
IMO, Chelsea would ideally be handled by Nagelsmann. thus, he will rebuild the team's squad in a modern football style. Nagelsmann is very suitable to be a Chelsea coach, especially now that Chelsea is more dominated by a young squad. thus, in the hands of Nageslmanns, Chelsea has far more progress. however, Todd Boehly prefers Pochettino. I don't know for sure why Chelsea didn't choose him. most likely, only Pochettino is willing to what Chelsea's management has to offer.
Now, Pochettino has officially handled Chelsea under his control. some of their players released in the transfer window this summer, some are still being kept. like it or not, Chelsea had to let go of several high-priced players to cover their expenses in the transfer market last winter. and even if, Kai Havertz, Mason Mount, still with Chelsea. not necessarily either, if Pochettino is able to restore their shining performance again. however, considering the statement that Pochettino made. he should have been prepared with what he would do with his squad. So, let's see how it will be when they take it match after match in the 2023/2024 season.