1) The squad isn’t going to be world class for any manager
Jose Mourinho has turned what was a championship winning team into one struggling near the bottom of the table but the truth is that the side massively over-performed last season against the backdrop of a weak Premier League. It doesn’t matter who is managing the club, Diego Costa will still be injury prone and lacking fitness, Cesc Fabregas would still be on a 2015 come-down and the defenders would still be slow and aging. That is just a fact of life. Chelsea’s squad, for all the money spent is very poor and very weak in depth. Chelsea’s squad needs a huge overhaul, that’ll need to be done in the summer so bringing a new manager in now to refresh the current squad is unlikely to deal with the issue, which is a long term structural one, not a short term one.
2) Who is available?
Chelsea have tried and failed with a host of different managers in the Roman Abramovich era. Of the many different men brought in only Jose Mourinho and Carlo Ancelotti have delivered league titles. Everyone else, barring a short stint from Guus Hiddink, has been a failure. The point is that Chelsea have tried a lot of different types of managers but not had success. Even regardless, who is available? Pep Guardiola is unlikely to come to Chelsea. Diego Simeone might be available in the summer, but probably not now (same with Pep). This means the club might bring Ancelotti back to the club. He has a good record and did well for Chelsea (albeit not brilliantly) but it looks like a step into the past to go back to a manager yet again.
3) He is Chelsea’s most successful ever manager
Undoubtedly there has never been a better manager in Chelsea’s history than Jose Mourinho, who has won the Premier League title three times with the club. Chelsea are unlikely to find someone who will bring in so much success, even if it wasn’t Mourinho who won the European Cup with the club. Chelsea need to back their man, allow him to sign the players he wants and at least give him until the end of the season. Sacking him now puts a lot of pressure on anyone coming in. Keeping him would give the world a signal that the club have changed their ways from the trigger happy sackings that followed on from Mourinho’s first stint at the club.
4) The pay-out would be obscene
Depending on where you get your news, Mourinho could be in line for a £30 million pay-out if the club sack him. That’s a huge amount of money for a club who are trying harder to balance the books. This would also be worsened by money that would need to be paid to his backroom staff who would likely be forced out to. Any new manager would also demand a huge wage, signing on fee and if they’re leaving another club, compensation too. Financially sacking Mourinho would be very pricey.