Perhaps it was a well-guarded "secret". 

Generally, however, I see individuals attempting to use +Lefebvre as a sock-puppet for their own opinion, cherry-picking whatever quotes they feel serve that purpose while ignoring the ones that don't.

Perhaps it was a well-guarded "secret". 

Psst! (Archbishop Lefebvre to Fr Epiney) Pssst! Hey Abbe! Can you keep a secret? I have something to tell you. I never say una cuм. Funny, hey, after that conference I gave to the sisters at St Michel en Brenne. https://dominicansavrille.us/archbishop-lefebvre-sedevacantists/ Yeh, they really fell for it. Well how can I say una cuм when the so called Pope is a public manifest heretic? Don't tell Bergy (Fr Schmidberger) and the bishops, they would take it hard. By the way, have you got a spare room here, just in case?

“You know, for some time, many people, the sedevacantists, have been saying, ‘there is no more pope’. But I think that for me it was not yet the time to say that, because it was not sure, it was not evident…” (Talk, March 30 and April 18, 1986, text published in The Angelus, July 1986)
...
“I don’t know if the time has come to say that the pope is a heretic (…) Perhaps after this famous meeting of Assisi, perhaps we must say that the pope is a heretic, is apostate. Now I don’t wish yet to say it formally and solemnly, but it seems at first sight that it is impossible for a pope to be formally and publicly heretical. (…) So it is possible we may be obliged to believe this pope is not pope.” (Talk, March 30 and April 18, 1986, text published in The Angelus, July 1986)

For twenty years Mgr de Castro Mayer and I preferred to wait…I think we are waiting for the famous meeting in Assisi, if God allows it.” (Talk, March 30 and April 18, 1986, published in The Angelus, July 1986)

That's a silly caricature.  Archbishop Lefebvre early on, at the time of the Nine incident, told them that they didn't have to insert Wojtyla into the Canon but should keep their SV views to themselves, so this dichotomy between doing something privately vs. publicly announcing it has been there for some time, and perhaps he would have been doing the same thing.  He could have just mentioned it to Father Epiney without the "Pssst!" nonsense, but then publicly continued acting as if he were the pope.

Here again we see the distinction between privately believing it and saying it "formally and solemnly".

I agree.  But this interview with Bp. Roy may be a break from "generally."  Bp. Roy seems very sincere and honest.  We've all heard the sedevacantist charges made against a ++Lefebvre in the past.  But this has the ring of truth.  I'm prepared to believe it, i.e. that the Abp. was not including JP2 in his Masses before he died.

Archbishop Lefebvre tolerated this attitude of these recalcitrant priests, provided they would agree not to be public about it, yet they did not keep their word, as the Archbishop told us, leading to the infamous exit of the nine in 1983.