The problem with that plan is that the only thing worse than constantly chopping and changing managers is sticking with the wrong one. Mourinho's showed he's not the right one anymore, 2 years in and he hasn't formed a team yet.
Maybe. Given his career record I'm not sure I'd write him off just yet. If they were to finish second or third this year he could argue that's decent progress given the cups last year. If they finish fifth though...