Whatever improvement we are claiming that Chelsea has attained isn't realistic. If there is an improvement, the results should say about it and as well as Chelsea's position in the table should also be able to say it. We cannot just because Arsenal was unable to win Chelsea and begin to praise Chelsea as they have improved. I am a fan of Chelsea, but I must say that we haven't improved to an appreciable and reasonable level.
Come to think of this, Chelsea is supposed to be a top contender of the English premier League title because they are not playing midweek Europe competitions. They have good time to train and have less matches to play which prevents fatigue and finally even a lil squad depth is ok for glory.
I am a Chelsea fan, Chelsea in the last 4 matches played quite well, they have not been defeated, they only drew with Arsenal, tomorrow Chelsea will be Brentford and Chelsea are the hosts, I am sure if Brentford uses a 4-3-3 formation then Pochettino will too using the same formation (4-3-3), currently Chelsea is in 10th position in the EPL standings, they must win in order to move up to 9th place.
in the league cup, chelsea will face blackburn, I am sure the match will not be difficult for the chelsea squad.
It seems that Chelsea will have to focus on the league cup and other related lower cups in England but for the English premier League, it is becoming obvious that Chelsea might make the top 4 again this year. My interest is no about Chelsea improving theoretically, the problems is how many matches have they won. In the England, if you don't win matches you will not be feared and one of the factors that make teams win matches is their ability to humiliate other teams. If your team has lost that fear, the can be played by anyone as ordinary team and that is the worse than could happen to anyone.