Yeah, I agree with you that Chelsea still needs a process to build a solid squad besides that it takes the right manager to do it, Chelsea actually started to find their game towards the end of the season and Chelsea managed to climb to 6th position in the standings chasing Manchester United and Newcastle but unfortunately these positive results did not make the club owner change his decision to look for a new coach.
This process must be carried out because if you wait then Chelsea will not be able to compete with several other strong teams. Forget last season and let the new coach carry out his duties as a coach and hopefully get support from the fans so that the coach can make big changes for Chelsea. Chelsea is not experiencing financial problems so it will make it easier for them to find the players they need, they just need to change the pattern of recruiting players so that they are more appropriate to what is needed.
Last season they spent a lot of money to recruit players but in my opinion it was not optimal because the price of the players recruited was too expensive but their individual playing form was far from expectations. The new coach's job is to try his best and try to make his players more consistent in facing the competition next season.
The problem that the new coach is going to have is if those players that Chelsea bought last season don't fit into his plan. If they don't fit into his playing philosophy there is going to be a lot of problem for the club, because they have to offload them and bring in new players, and that's going to be a big loss for the club. Chelsea gave those players long contracts and if they are to leave Chelsea are going to lose big time because none of those players in Chelsea current squad can command the price they were bought in the transfer market. And of a truth the coach are going to bring in his players that he feels he will be comfortable with and most of the players that came into Chelsea last season are definitely going to leave or they will accept the bench duty.
Enzo Maresca has big intentions of building a stronger club, he will not care about this because the players he previously recruited have not proven any improvement so Enzo Maresca needs players who are truly productive even though they have to suffer big losses.
I actually also doubt whether Enzo Maresca will be approved by the Chelsea owner to sell a player who was useless last season because if you calculate the loss it will be very big, but if the Chelsea owner believes in Enzo Maresca, all of that could be done.
This is just my speculation at the moment if Chelsea will sell a lot of players who failed this season and will prefer to prioritize the players chosen by Enzo Maresca because Todd Boehly seems to have confidence in this new coach.