Well this whole EENS issue seems to be a never ending nightmare because it has never been officially settled.
Sorry but it has been in fact settled by the Church long ago.
THE INFALLIBLE DOGMA OF EXTRA ECCLESIAM NULLA SALUS "There is only one universal Church of the faithful, outside of which no one at all can be saved." (Pope Innocent III, Fourth Lateran Council, 1215)
"We declare, say, define, and pronounce that it is absolutely necessary for the salvation of every human creature to be subject to the Roman Pontiff."
(Pope Boniface VIII, in the bull, Unam Sanctam, 1302)
"The Holy Roman Church firmly believes, professes, and teaches, that none of those who are not within the Catholic Church, not only pagans, but Jews, heretics and schismatics, can ever be partakers of eternal life, but are to go into the eternal fire 'prepared for the devil, and his angels' (Mt. 25:41)., unless before the close of their lives they shall have entered into that Church; also that the unity of the ecclesiastical body is such that the Church's sacraments avail only those abiding in that Church, and that fasts, almsdeeds, and other works of piety which play their part in the Christian combat are in her alone productive of eternal rewards; moreover, that none, no matter what alms he may have given, not even if he were to shed his blood for Christ's sake, can be saved unless he abide in the bosom and unit of the Catholic Church." (Mansi, Concilia, xxxi, 1739; Pope Eugene IV, in the bull, Cantate Domino, 1441).
All three of these statements are ex cathedra definitions of the Church and of the Pontiffs who made them. (Ex cathedra means that these are infallible teachings of the Church which all persons must believe in order to be saved. These teachings are not subject to change as the popes in making these declarations of faith were guided by the Holy Ghost, Who is unchangeable.)
The mentioned formula (Extra Ecclesiam Nulla Salus) is a doctrine of Catholicity, it is the standard of orthodoxy on the subject of salvation; which is to say, all writers, whether they be saints and/or Doctors, of old or of late, all popes and theologians, of whatever era, and their pronouncements are reliable in their treatment of this subject, if they accept and support it. Otherwise, they fall into error.
This dogma rules out the possibility of simple invincible ignorance concerning the matter of salvation; those who die in ignorance of the Church as the only course of salvific grace are still culpable. Basically, they did not know because they did not want to know (those of good will shall be drawn to God through Christ).
If there is salvation outside the Church, what difference does it make whether one is in the Church or out of It, whether one is a heretic in the judgment of the Church or not? Really, if to deny this doctrine is not heresy, there is no such thing as heresy.