Pope Francis on his own can announce that in Vatican Council II , Lumen Gentium 16 must be considered implicit and not explicit for us. So the ecclesiology of the Church will not have changed.It will be that of the SSPX and the sedevacantists.
This would help resolve the SSPX, Franciscans of the Immaculate and sedevacantists doctrinal problem.It is based on Vatican Council II and its interpretation.
By saying that LG 16 is implicit and so does not contradict the dogma extra ecclesiam nulla salus (EENS), the pope would correct the doctrinal and theological error, which is now common in the Church.
It would be a factual and honest statement from the Vatican and it would have ideological and political responses from various groups.
In the Year of Mercy let the pope speak the truth.There are no explicit for cases of persons saved without the baptism of water. There are no known cases of persons saved in invincible ignorance(LG 16), imperfect communion with the Church (UR 3), seeds of the Word (AG 11), elements of sanctification and truth(LG 8), a ray of that Truth(NA 2) etc- with or without the baptism of water.
So LG 16, LG 8, UR 3, NA 2 etc being invisible for us in the Year of Mercy, are not exceptions to the 'rigorist interpretation' of the dogma EENs.There are no exceptions to the traditional ecclesiology of the Church,that of the SSPX, traditionalists and sedevacantists.
With LG 16 implicit for us, the ecclesiology would be the same for the old and new Mass, for the Franciscans of the Immaculate.
The Auxiliary bishops of Rome, Zuppi etc, are not expected to say LG 16 is invisible instead of visible.Since they are obligated to the liberal rabbis in Rome, who monitor the activities of the Catholic Church.