I think this is totally unfairYou make a solid point. I think it boils down to what is almost the hardest thing in football which is how to move into phase 2 of a strong first cycle. So many examples of teams flopping badly in this regard: Leicester after their title win (although they now seem to be back on track), Arsenal managed it once but then failed to build on the Invincibles side, Liverpool are finding out how hard this is, Everton badly lost their way after Moyes left. Perhaps the best example of failing to move smoothly from a strong first cycle into a second cycle is Chelsea, who since Conte left have gone through 3 managers and untold cash to basically go nowhere.
Poch so obviously struggled in this regard. His new recruits were disasters and he became more and more unhealthily attached to members of his 'old guard' who had served him so well in the first cycle but couldn't be relied on to move to phase 2.
SAF was peerless in this regard. And it is for this reason I argue that if Pep wins the CL (the league is a given at this point) having moved from the 2018/19 cycle to a new phase that doesn't include former talismen like Kompany, Silva, Fernandinho and Aguero, he thoroughly deserves the accolade of the best manager of the recent era (i.e. since Fergie).
Funnily enough, in ranking managers who are good at moving from a strong first cycle to an equal or better second phase, I would place Mourinho near if not at the bottom of the list.
He's usually been sacked before Phase I has finished
