It's going to be tough to handle Chelsea who you liken to a pressure cooker because the team themselves always want good results quickly without wanting to see the process first. Chelsea should realise that in order to make a team better it has to go through a process that doesn't even take a short time to achieve what they want. Because in the Premier League the competition is very competitive and I think Chelsea already know that so they should realise that changing managers every season is not going to change anything in their own team.
Changing manger is even going to turn out detrimental and counter productive for them because they will literally have to start on a new sheet every season with their managers trying to get the team adopting to new strategies and new managers who comes with their varying characters and approach to coaching. This may even in a way affect the performance of some players and they would want to leave when they can no longer cope with the changes.
It's still very possible for Chelsea to get better but they will have to try to stick with this particular Coach awhile so they can learn to getting use to his style and implementing that which he's got which they may improve on in the long term if it happens that t he team is adjusting to it and seeing some results they would want to improve as they forge ahead in the season. The competition in premiere league is such that requires any team that is willing to attempt the title race to have attained some level of stability to be able to withstand the competition they will be facing in the champions league.
Teams like Tottenham is even more of a competitive rival to the top teams currently than Chelsea because they have got some consistency and are even able to perform brilliantly at some point which all they need do now is working on their mined set and improving in their technicalities, they will stand strong shoulder to shoulder competing with other to teams, Chelsea can get to this points if they are able to make necessary adjustments and improvements and not just changing of managers.