I don't quite agree that we've chopped and changed since KB, I think we stuck with Poch for a good long period and then everything sadly came off the rails. I'd say we've been erratic since that time for sure though.
Winning the EL is monumental but it is not a compelling reason to stick with a manager, who was the last manager to win silverware for us? Ramos in 2008, next season he had 2 points from 8 games, you might have heard Redknapp using this stat once or twice!
My point is that Ange has simultaneously given us the greatest gift of silverware but genuinely, over a prolonged period, delivered a very poor standard in the league, it's not just mid table mediocre, it's not something you can solely blame on injuries or quality of squad.
This has squad, for better or worse has been constructed at huge expense and while I get that there will always be unexpected losses, some tactical masterclasses where we may get outsmarted, there is really no excuse for the 38 league results this year and levels of performance we've experienced.
The heart says Ange has given us something priceless and deserves our support, the head sees the numbers, looks at the performances objectively and knows, keeping him would endanger our chances of survival next season. It gives me no pleasure in saying it, but we need to chop and change again.