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.
All the teams in the English Premier League are very strong and I believe the bottom team in the English Premier League points table can beat the top team in the points table. West Ham is a slightly weaker team than Chelsea so against West Ham Chelsea should have performed well but Chelsea failed to win against West Ham. Chelsea has not started this season of the English Premier League very well so far. They drew 1-1 in the Premier League opener against Liverpool which is a fairly good result for them but they should have won against West Ham. But Chelsea lost by a huge margin against West Am. Chelsea had a chance to go ahead in the 67th minute when Ham reduced to 10 men but failed to do so. With this team of 10, West Ham managed to score another late goal against Chelsea.