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.