I think changing the coach can be working for any team if they chose a suitable coach for their team just like Bayern Munich and Tuchel. They hired a coach and they performed much better against Dortmund. Regarding Chelsea, they fired Potter finding a new coach who can help this team is a real pain for them, they should be thinking about a coach to help them have a better situation for the rest of this season and then invest in him for next season.
In the Premier League, Chelsea will definitely not be able to change anything this season, and all they could count on was the Champions League, but sacking Potter before the match with Real is a very serious step. Tomorrow they play with Liverpool, on Saturday with the Wolves, the schedule is tight, but most likely the Champions League will remain a priority.
I see that either Pochettino or Negelsman are being considered in place of Potter. But in the case of Negelsmann, Chelsea will have to pay Bayern a hefty compensation, and Bayern could refuse as they risk facing him in the semi-finals. Therefore, in order to choose this particular option, Chelsea will have to wait until the end of their performance in European competition.
I like the variant with Negelsman, I think that with such funding he could get a good result. By the way, I thought that Negelsman would not be left without a team for a long time, this could happen in the near future.