To restore balance in the squad and drive the team to maintaining consistency of winning games?, and Where are those facts since he was sacked ?, Whatever story that may have caused the sacking, I think that was a wrong decision by the owner and the entire Chelsea management board.
They Forgot that in live there ups and down times and same is applicable to coaching, I never sided the sack of Thomas Tuchel one day, that issues should have been resolved with the team or the management of Chelsea and with time everything would move back smoothly for the club entirely.
Of course Chelsea's new owners choose him, he will get a lot of opportunities. He will probably be given funds to shop for players later in January. I think Chelsea's development is still pretty good, sacking him will only add more problems for Chelsea. Because I actually know, there are no achievements that come instantly, everything requires a process. Chelsea are doing pretty well in the UCL so I think their chances of qualifying are the same as Dortmund.
Firing and bringing in a new coach is a risk taken by Chelsea. Don't be surprised when the sacking doesn't produce better results than the sacked coach will become a conversation that will corner Chelsea for making a decision too quickly. Also vice versa if the dismissal produces very good results then they will be given credit for doing something very right.
This has already happened between Thomas Tuchel, Chelsea and Graham Potter. Now the best choice in my opinion is to continue to put faith in Graham Potter. And also give him the opportunity to freely get several injections of new players, even with the limitations that Chelsea are currently experiencing.