Wow.  Have been noodling the way priests ad lib words of the mass, did some checking and found this:

The Holy See’s 2004 disciplinary document, Redemptionis Sacramentum, states very emphatically:

59. The reprobated practice by which priests, deacons or the faithful here and there alter or vary at will the texts of the Sacred Liturgy that they are charged to pronounce, must cease. For in doing thus, they render the celebration of the Sacred Liturgy unstable, and not infrequently distort the authentic meaning of the Liturgy. [italics added]

I like the reasoning, but I take special note of the date.  This issue is neither brand new nor dating back several decades and so no longer current in the eyes of Vatican detectives and judiciary.

Definitely more later on this, as instances pile up.  As I said before, for those who pay attention, it’s annoying, to say the least.