You are right, the arrival of new players certainly brings new hope to the club. But they may need time to adapt to the team's style of play and strategy.
Chelsea's performance wasn’t really good in their last match, but I am sure there will be some improvement in Chelsea this season. This is just the beginning of the season, and it won’t really be easy for the new players joining the club, but with time they will be able to adapt. From the way Chelsea is playing this season, there are really great changes in their performance, but they are still having some lapses, which I am sure their coach will be able to figure out with time. I'm sure Chelsea is going to end the season in a better position.
Yes, this is a slightly less good start to the season for Chelsea, of course, they still need time to find the style of play that their new coach Mauricio Pochettino wants, where the strategy given certainly needs to be adjusted to their squad players, this is also a challenge for Mauricio Pochettino to to restore Chelsea's slump last season, of course all supporters don't want to see Chelsea also slump this season.
I know that at the beginning of the season good clubs can look bad but in the middle of the season to the end of the season they usually find their style of play so that they can establish a position on the winning path, I personally never bet on Chelsea because I know they are in the process of recovering from their slump, right now they are even ranked fifteenth in the standings far worse than last season ranked twelfth.