I think this is the best step by having a new manager for Chelsea at the start of the season and it also seems that Pochettino may need time to be able to revive Chelsea next season to become a club that is respected by other clubs, Chelsea's rise from adversity depends on how Pochettino chooses players in the team squad Chelsea.
I would say that only changing the coach cannot be a solution. The coach should be allowed to work independently. And at the same time, the coach should be given the opportunity to form the team according to his choice. For this Chelsea management should prepare big funds and get the required talented players in the team. While Chelsea's squad is strong, the bonding between their players is very weak. Although the coach has changed several times, the bond between the players has not strengthened. So Chelsea's performance was poor. This is why Chelsea should look for new players.