Saints have been added at three levels and most people never realized it.
Universal Church: the Holy See added saints and holy days or deleted some
National Conferences: we have always had certain days that are observed in some countries and not in others. I remember being in South America where the Assumption is a feast, not a solemnity and the feast of St. James is a major solemnity, because he’s the patron. There are other examples.
Religious: the major religious orders have always had our own calendars. We had our own version of the Roman Missal. In my own family it was called the Seraphic Missal. Today we have the Roman-Franciscan Missal. We have Mother Teresa and John XXIII on our calendar, because both were part of the Franciscan family. The Franciscans of the Immaculate are already working on a new edition of the EF to accommodate the Franciscan holy days. Hopefully, when they finish, the rest of the obediences will have access to it. They have a friar who is an expert in liturgy, language and Franciscan theology leading the project. The Vatican has approved it. Eventually the Jesuits will do it, the Augustinians will, the Benedictines and any of the major orders of men that have always had their own missals, reactionaries and calendars. If these men are at your parish, you will see these subtle differences.
The point is that adding and deleting saints and holy days is not new. There is also a request in to unify the two calendars so that everyone is celebrating the same seasons. For example, right now the EF and the OF are not in the same season. If you’re talking about one rite, your seasons should be the same within the rite.
None of this affects the form.
Fraternally,
Br. JR, OSF
