The "Areas of Difficulty" document you attach criticizes parts of the new translation for not being faithful to the Latin and weaking scriptural allusions. I think that is a fair criticism. The 1998 ICEL translation that you champion omits "under my roof" from "Lord I am not worthy. . ." Omitting this phrase is both unfaithful to the Latin text and weakens the allusion to the Gospel. As far as I can tell, almost every English translation of that particular Gospel text since the King James version, if not before, uses the "under my roof" turn of phrase.

Which particular "principle of liturgy" would allow such a problematic translation?