There was a controversy in the early Church on when to celebrate the Crucifixion of Jesus: according to the timing in the Jewish faith for Passover, Nisan 14, or instead according to the day of the week, Friday .
Saint Robert Bellarmine discusses the case of Pope Victor I, who excommunicated whole churches in Asia minor, churches whose only offense was that they wanted to celebrate on the 14th of the month, rather than always on a Friday with different days of the month. This group was called Quartodecimans (basically, fourteeners). Saint Irenaeus and many others objected, thinking this decision to be too harsh. But the decision stood. They were excommunicated — whole churches were cut off from the one true Church for which day they wished to commemorate the Crucifixion.
Bellarmine: “Moreover, this must be observed, that although Irenaeus and others then thought that [Pope] Victor had acted imprudently, nevertheless, really he acted very prudently, as the whole Church judged afterward.” 
The first point is that, while many persons, even Saint Irenaeus thought the Pope was wrong, history proved him right. The Church, in order to maintain unity, must celebrate the Crucifixion on the same day. If one form of the Mass is needed, in the Roman Rite, to avoid schism, then that decision is prudent. Can unity be obtained in another way? The other path would be for those who oppose Pope Francis to repent and support him instead.
Bellarmine: “For in the same measure, whereby there were many displeased by the sentence of Victor, so they could more easily condemn or rather more preferably excommunicate Victor, if they thought he was one from the number of bishops, rather than the head and judge of all. But in reality, there was not anyone who taught that the sentence was void, or thought that Victor must be condemned or excommunicated; nor was there anyone who warned him lest he might exceed his limits and lest he might judge those not subject to him; in fact, they ought to have warned him if Victor truly was not the judge of all. Moreover, they reckoned Victor did what he could, not what he ought.” 
Notice how many opposed the Pope’s decision, and also that they could do nothing against him. The Pope could not be excommunicated. He could not be deposed. Instead, his decision on discipline prevailed, proving that the decisions of the Pope, even on discipline, have the full authority of Christ. No Pope exceeds his limits by a decision of discipline. He is the supreme judge of all the faithful. And the next Pope is also the supreme judge, and may make a change to discipline. Discipline is changeable, and is under the authority of each Pope.
Pope Francis has the authority to restrict or abrogate the Latin Mass, and if some priests and people refuse to comply, he can take action against them, including suspension, excommunication, or laicization.
1. Jesus died on Friday, Nisan 14. Should Christians keep this solemnity always on Friday or always on Nisan 14? The Church chose Friday, the day of the week, over the day of the month (Nisan 14 would not always be on a Friday).
2. Bellarmine, Robert. On the Roman Pontiff (De Controversiis Book 1) . Mediatrix Press. Kindle Edition.