Cardinal Mueller: Liturgy as such is not the problem
"The liturgy as such is not the problem, but rather the unfounded accusation by the FSSPX that the Catholic Church, under Popes Paul VI, John Paul II, Benedict XVI, Francis and Leo XIV, has dogmatically deviated from the Catholic faith, absurdly counting the Novus Ordo Mass among the deviations, which according to the Fraternity contains dogmatic errors, such as the fact that its sacrificial character has, if not denied, at least been obscured in favor of a mere memorial meal...The old or new rite is not the problem. Both sides—unfortunately also the authoritarian agitators in the Roman Dicastery for the Liturgy—do not properly appreciate the theological distinction between the substance of the sacraments and the various liturgical forms. A mere disciplinary suppression of the old rite and the general suspicion of its adherents as deniers of Vatican II are not only pastorally questionable but also dogmatically untenable.
I myself have considered the restriction of the celebration of Mass in the old rite to be very unwise from a pastoral standpoint, not because I am a supporter of the old liturgy myself, but because as a Catholic and especially as a theologian, one must also acknowledge the spiritual richness of the older rite, and because there is no justification for haughtily elevating oneself above one’s friends. Incidentally, the liturgical reform did not create a new rite, but merely simplified the previous rite, which itself had emerged from a not always homogeneous development, so that the faithful could participate more easily, both internally and externally (in the vernacular)."
the whole interview may be found here: Is a Schism in the Air? An interview with …