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.