Cardinal Cupich is not the only person to suggest that a "Paradigm Shift" has occurred in this pontificate.
I am not sure what a Paradigm Shift, precisely, is. Words are malleable things, and it is quite possible that some eirenic person could elaborate a henotikon defining the phrase in a way that could be conformable with my Conscience, acceptable, as we now have to say, to the "aboriginal Vicar of Christ" within me.
[For example: Benedict XVI condemned the notion which, as he said, grew up after Vatican II, that "A pope can do anything". Was this his most laudable condemnation a Paradigm Shift? Surely not. I would strongly prefer to discern it as merely a return to sound Tradition which had been ignored by wickedly ambitious men; and the condemnation of a corrupt tyranny which ought never to have been allowed to seize power in the first place.]
But at this present moment and in this particular context, I understand the words 'Paradigm shift' as indicating a radical restructuring contra Scripturam et Traditionem of the basic grammar of Christian belief or practice so that, by a touch of this Circean wand, X is transformed to become non-X. So I find the formula unacceptable in Conscience. I would be willing formally to repudiate it. Vatican I did not say "The Holy Spirit was not promised to the Successors of Peter so that by His revelation they might publish new doctrines, but so that by His help they might shift the paradigms". What Vatican I did say, I hope the readers of this blog know rather better than some eminent individuals appear to.
So, if Cardinal Cupich were able to assure me categorically and convincingly that PF really has shifted a paradigm, my Conscience, ineluctably potent within me, would compel me to retort "So you too are now accusing the Holy Father of propagating and promoting heresy. Excellent! Welcome to the fold! Have a drink! I'm sure you would like to subscribe to the Filial Correction. Let me lend you my pen!"