Even St. Catherine of Siena, whose most famous calling in her short but dramatic life was to be a persistent corrector of bad, weak or stupid popes, addressed them as Vicars of Christ.
Incidentally, I think that this "Humanum" conference (mis-named "Humanus" by the above author) is huge --- and something you'll not see in the secular press (link)
Has St. Catherine of Siena informed you as to whether that appellation is still applicable in the case of the current (and possibly last) pope?
Ambrosial: exceptionally pleasing to taste or smell; especially delicious or fragrant. (???)