The approbation-line of B-16 does not include "forma specifica," meaning that this doc will NOT over-ride norms of Bishops' Conferences (and maybe even Bishops.)
So (if this is the real doc) we're kinda where we were 120 days ago. Bishops can and will do what they damn well please.
An encyclical is due on December 8th. Let's see what that is about. If it is about the Liturgy and a call to one with more Latin and less experimentation and perhaps a nod to the Tridentine Rite, a bane of the hippie Leftists, then his assault will be on two fronts.
Pas d'ennemis a droit!
Frank