Continued....
Cardinal Mueller has diplomatically refused to butt in and clarify what the Pope intends in AL  Yet he has already concurred with the interpretation of Arcbishop Chaput and Bishop Conley quoting the 1994 Declaration of the CDF and Pope St John Paul's Encyclical, Familiaris Consortio. He can hardly now espouse Kasper's and Schoenborn's interpretation.
I imagine that his resignation, forced or voluntary, would damage Francis far more than it would himself.