"Thank God the group of Campos has come out of a situation which COULD HAVE brought about a state of formal schism."
Assuming these words of Cardinal Castrillon Hoyos are reported correctly, then it looks like he does not think that even the Campos situation had yet developed to a formal schism!!!
"So, where there had been a bishop, priests and a group of independent faithful, the same Mons. Rangel and his priests, by an act of humility and repentance, responding to the invitation of the Holy Father, now felt an obligation in conscience to reenter into full communion with the Church, recognizing that the conditions of what they had considered as a so called "state of necessity" no longer existed."
Looks like the answer for the SSPX is to set up full parallel ecclesial structures (including a bishop) in each diocese where they are active until such point that a critical, self-sustaining mass is achieved. Once done, a state of necessity would no longer exist and then Rome would grant an Apostolic Administration.
The precedent of Campos could prove to be a vehicle for restoring Tradition to the whole Church which would circumvent the majority of non-believing bishops that we must currently contend with!
Our Lord only had praise for those who were battering down the gates of the kingdom of heaven to enter it by force - perhaps the times are ripe for desperate measures again.
I have a question, what is your opinion of the Novus Ordo done the way Bromton Oratory does it?
There is no need for the SSPX to do that. Rome has offered a universal Apostolic Administration to the SSPX already, what would in effect be a world-wide diocese.