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There is no guarantee that Enzo Maresca will make Chelsea's performance much better next season, I think Enzo Maresca is currently taking a job with very big risks, as we know in the last two seasons Chelea's management has fired many coaches and it is possible that Enzo Maresca will suffer The same.
Chelsea management made many mistakes, they wanted instant results and did not provide full support to the coach so that the team's performance could not improve, so if that continues to happen I am sure the same thing will happen to Enzo Maresca.
Enzo Maresca must make changes to prevent himself from suffering the same fate as the previous manager. Chelsea really wants to return to the peak level that was achieved when Abramovich was still in charge, but transfer policy factors and inappropriate selection of coaches make it difficult for them to develop their quality. Enzo Maresca will face various challenges in his first season because there is a lot of work to be done, the squad left by Pochettino needs to be polished again to show its quality. Management must be patient with the situation that is happening to their team and provide support to the coach to rebuild the squad which has experienced a decline in performance in the last few seasons.