Thank you for this excellent review, Marian Ronan! 
Yes to Phan's concept of "Multiple Magisteria" to include "those of the theologians, the laity, the poor, and believers of non-Chrisitan religions (which) must also be considered to achieve authoritative teaching."  Phan might even add women here since women's input is so consistently ignored by the Magesterium. 

Great point here:  "Just as Jesus Christ humbled himself by becoming human (Philippians 2), Christianity is called to a kenotic (self-emptying) theology in which it renounces its assumed superiority over other religions. The mission of the church, then, is not "to the gentiles" but "with the gentiles," collaborating with members of other religions to bring about the reign of God."  https://RiteBeyondRome.com