At least the current Chelsea supporters are relieved that management has done what they want. Actually, for a long time, Chelsea supporters have urged Chelsea to immediately fire Graham Potter because they were deemed unable to make a difference to the game from Chelsea. It may take a long time for the Chelsea management to make a decision whether or not to sack Potter, and now that decision has been made.
Yes, many are happy with Potter's dismissal, I think it's natural because Chelsea's game did not progress when he was in training. I think it was Potter's fault that there were 2 reasons why Chelsea didn't develop.
The first thing I saw was that Potter really liked the players, because the players didn't get too much pressure from the coach. But this was a blunder for Potter himself because the results he achieved were very, very disappointing and there was no progress every week.
Second, Potter is always wrong in giving a line up or changing players in the second half. Indeed, many players piled up in the Chelsea squad. But Potter never replaced players who were not performing, including Havertz. Besides that, Potter is too special for native British players like RLC, and Gallagher.