Stoke, sacked manager, got better
Palace, sacked manager, got better
WBA, sacked manager, got better
Leicester, sacked manager, got better
West Ham, sacked manager, got better
Swansea, sacked manager, got better
Everton, sacked manager, got better (then went shit again, harder job, ageing manager)
I think the template is fixed now, the money men can work out the response when the trajectory is downwards.