While I completely applaud the FAA's switch to compliance vs. enforcement, I still think that the individual FSDOs willingness to enforce the rules in a locally unique fashion will remain.
Nearly every recent Office of Legal Counsel letter regarding crew rest specifically has some cri de coeur where the correspondent asks "if X is illegal why is my FSDO allowing it?" to which the FAA lawyer replies with some version of "Their FSDO, their rules."
To me, its very clear that the Office of Legal Counsel at FAA would like a lot more uniformity in the application of fairly straightforward things like rest, the fact that Enforcement and Legal Counsel meet at the Administrator (IIRC) and the Enforcement side can always say "We are doing it this way."
As long as operators see dollar signs in non-compliance with the rules and interpretations, and POIs are paid by the airplane, I don't see much hope for fair application.