I can't say if Chelsea has improved in their performance or not, it's when the new season starts is when we would know. However, their performance in CWC is impressive and their fate will be tested in the finals when they play against PSG who have destroyed and humiliated top big clubs in various leagues in recent times.
Chelsea have no doubt been impressive since last season when the season was about to end. We saw them also booking a spot in the champions league for next season which is a good progress for them from playing in the conference league last season and winning the trophy, to playing in the champions league next season.
Chelsea has also given us the best of performances in the club World Cup which makes us to have trust in them once more to have improved from the way they use to be few seasons back. The final will really test their strength and even if it doesn’t go in their favour, they look to be back in form with consistency.
Getting to this level is already a win, fans will never accept but it takes a lot defeating other teams. The final match PSG vs Chelsea is likely going to be tough, viewers are more concerned about Chelsea due to their past performance although Chelsea improvement is getting better and for some kind reason I can’t predict yet who’s going to win.
The most common thought people get PSG might likely defeat Chelsea like the probability is so high although this is football and it’s unpredictable, anything can happen even at a close time range.