I think it was a turning point for Chelsea to win the conference cup even though they were playing third rate teams. Because Chelsea had started to lose the success of their past and they were in a decline. This victory was a motivation and a starting point for them. After that they managed to reinforce their motivation with the victory against PSG. PSG were the hottest team of the season and the clear favorites for this match. Maresca won a tactical victory. With this victory, Chelsea became the surprise winner of the tournament and ended PSG's domination of the competition. This victory shows that Chelsea have made a serious leap towards the Premier League and Champions League in the new era.
Separate games mean nothing. Maybe PSG was exhausted by the previous games plus everyone predicted an easy win for PSG and this led to the burnout of the PSG players. But even if Chelsea is really stronger than the best team of the season at the moment, this does not automatically mean good prospects ahead. Bookmakers quote Chelsea's chances of winning the title as 1 to 13. I think you will agree that against the background of City, which went into crisis, the fresh champion and Arsenal, which have passed their peak, this looks like a very weak quote.