At least with the new coach now Todd has hope that Enzo can change Chelsea to be better than before although surely this can be realized will be very difficult to do but on the other hand we also cannot judge as if Enzo will not be able to bring Chelsea.
Before a coach is signed, the management always has the hope that the club's performance is going to improve. The same thing is happening to Enzo, everyone is expecting a better performance from the coach, but we don’t know how the coach is going to perform yet until the season starts. A coach might be performing well in a particular team, and when the coach decides to join another team, his performance might reduce, so I can’t really wait for the season to start so that I can see the pattern that he is going to be using, and I hope Chelsea performance next season will be better than last season.
The hope of getting the team's performance out of decline is always a priority for management. Changing coaches is common in a club when the team's performance is not as expected. Chelsea management has high hopes for Enzo Maresca, they consider Enzo to be the most appropriate figure to improve Chelsea performance after he was successful with the previous team.
Changes in the squad began to be made gradually, since Enzo was appointed as head coach, management immediately dipped into their pockets to bring in new players. Next season there will be several new faces in the Chelsea squad, Enzo must be able to fulfill management's expectations after they have worked hard to see his team can compete in the title race.
You are right, changing coaches is natural thing that happens in team to improve the quality of playing performance, but for Chelsea can it be said to be natural thing because they always change coaches more often.
There is no real fundamental reason for what Chelsea has done regarding the frequent changes in coaches over the past few season, what is clear is that this kind of thing does not improve performance but causes decline that could be more significant.
But on the other hand I agree if we say Enzo Maresca is great coach, we won't know until we see him whether he will be able to change Chelsea or not because it is not an easy matter to develop team like Chelsea.
If it fails, perhaps Enzo Maresca fate will be the same as several previous Chelsea coaches who were fired more quickly and easily replaced by other coaches, he must prove his performance with success to avoid something like that happening to him.
Moreover, his experience is quite satisfying, having been an assistant coach for Pep and most recently being able to bring Leicester City to promotion to the Premier League.