Because I think we need to differentiate between this being just a really bad spell where everything has gone wrong after winning the title, and Slot having no fucking clue and fluking the league and subsequently losing the plot and the dressing room.
Him winning the league gives him that stay of execution and a chance to see if he can turn it around and determine whether last year was a fluke or not.
I'm leaning towards him being a dud, but I'm not absolutely certain yet.