The preamble (RS 1-13) seems to come to a climax with this section, in which vital theological concerns are presented.
[11.] The Mystery of the Eucharist “is too great for anyone to permit himself to treat it according to his own whim, so that its sacredness and its universal ordering would be obscured”. On the contrary, anyone who acts thus by giving free reign to his own inclinations, even if he is a Priest, injures the substantial unity of the Roman Rite, which ought to be vigorously preserved, and becomes responsible for actions that are in no way consistent with the hunger and thirst for the living God that is experienced by the people today. Nor do such actions serve authentic pastoral care or proper liturgical renewal; instead, they deprive Christ’s faithful of their patrimony and their heritage. For arbitrary actions are not conducive to true renewal, but are detrimental to the right of Christ’s faithful to a liturgical celebration that is an expression of the Church’s life in accordance with her tradition and discipline. In the end, they introduce elements of distortion and disharmony into the very celebration of the Eucharist, which is oriented in its own lofty way and by its very nature to signifying and wondrously bringing about the communion of divine life and the unity of the People of God. The result is uncertainty in matters of doctrine, perplexity and scandal on the part of the People of God, and, almost as a necessary consequence, vigorous opposition, all of which greatly confuse and sadden many of Christ’s faithful in this age of ours when Christian life is often particularly difficult on account of the inroads of “secularization” as well.
The challenge is what of aspects that are changeable: musical repertoire, and especially the homily. These pieces are also bound up with the time of the liturgy, and like it or not, poor music and preaching, even when theologically sound, can harm the faith.
Phrasing it in the sense of a “right of Christ’s faithful” isn’t the whole story. Pastoral leaders have a responsibility to develop and ensure quality, if not a profound ars celebrandi, so that the liturgy may be most effective in transmitting the faith and inspiring Christian apostolates in the world.
Otherwise, I’m in broad agreement with this section. What about you?