Cardinal Blaise Cupich of Chicago hints at more. He praises Magnum Principium, saying, "It sends a signal, regarding the methodology that will be used in bringing about other reforms that are being considered by the Council of Cardinals."
The Francis is bent on destroying the papacy, yet he acts like a dictator in punishing orthodox Catholics.
Ultimately it comes down to this simple fact:
Each individual will have to answer on judgement day for their own person actions and inaction. So to the individual, it is IRRELEVANT what priest, pastor, scholar or pope says. It is the individual who will decide what they will accept and follow. Thus, the defacto authority for interpretation is the individual, not the community or church.