"Are we just supposed to passively wait another 70 years?"
Bingo! You betcha. Everything else has been tried.
...Yes, even Bp. Roy's idea. Several groups got together (as best they could -- Trads could never get along) and attempted to elect a Pope to bring an end to the Crisis in the Church. We have had several Trad anti-Popes over the past 56 years. The young will have to Google or ask on CathInfo for the names, since it was all before their time. But it doesn't change the fact that we've been there, done that, got the T-shirt.
Oh, but they didn't have a website. 
Hey, patiently waiting and trusting in God to untangle a supernatural mystery puzzle is not exactly crazy talk. The various groups being invited to this meeting -- not a single one of them can give you an explanation of what happened with the Crisis in the Church, the exact status of the Pope, or how the Crisis will be fixed with anything approaching certainty, authority, or perfection.
Oh, there are PLENTY of opinions, mostly strong ones. But every last position has an achilles heel or two, that people accept because it's the "least bad option" to them. But none of the options are perfect. If you don't understand (or accept) that, then your understanding of the Crisis in the Church is imperfect at best.
Is it logical to believe that man could solve a problem he didn't cause? Was the Crisis in the Church/Modernism a human screw-up that man by his own powers could rectify? I don't think so. Is the Church a human institution? No.
God struck the Church with this Chastisement, and we have no other choice but to patiently await His mercy in ending the punishment.
He was merciful in leaving us all lifeboats, so EVERY MAN OF GOOD WILL could reasonably find one if they wanted to. He is Merciful as well as Just.
But this Crisis is a chastisement, there is no doubt about that. Like World War 1 or 2 in the spiritual order.
I'm not on twitter, but I heard that a CMRI priest was very vocal there on this subject, and so I spent some time this evening perusing the threads.
I have come away with a feeling of almost numbness, and also a desire to place the whole matter of the Church squarely in the hands of Her Founder, our Lord Jesus Christ.
What I saw on twitter tonight was very disedifying. A bunch of sedevacantist clergy were challenging each other, and arguing. I try to stay away from this kind of thing, but I know in my heart that it has been going on for decades.
It's like watching sports teams and their fans. No one seems to care for the Church or for souls. It's just about winning arguments and bringing home trophies.
Pierre Roy stands up and makes a splash, and he ignites a firestorm, most especially inside the sedevacantist arena where the thesis versus totalist joust never ends.
Somewhere in one of your rants, Matthew, you made the point that this is just a sede cafeteria squabble, that there are entire contingents of other priests who are not even registering this "seismic event" in their day to day. I think that may be substantially correct, unless Roy is networking behind the scenes with epic efficacy that we just cannot detect.
This thing really is going nowhere if only a few sede clerical-debate jocks shoot spitballs back and forth on social media. To be honest with you, what I saw tonight on twitter thoroughly disgusted me. It's the same petty smallness I've gagged on the last thirty years.
I disagree with you that we are
supposed to wait another 70 years. I am morally certain that it is God's will we act - act together, as a body.
"My grace is sufficient for thee."
But I am equally certain that there is no one among the old guard sedevacantist clergy who can assume enough of a mantle of authority at least to persuade the others to put down the swords long enough to assemble together.
Bp. Roy seems to have enough agency power to start a shit storm, but I think he simply put a match to a powder keg.
If we keep our eyes on men, it's a three ring shit show brought to you by Clown World. There is absolutely no way in hades any man in the world can make anything happen.
The good news is that they won't go forward if God does not put real wind in the sails. I have some confidence in Bp. Roy, who is a true outsider. What I mean is that he comes to his conclusions on his own, as a solitary thinker, and in his own good time. When he became convinced of this, he started acting in accordance with his conviction, come what may. I believe him when he says that if this thing goes nowhere - if God does not help it along - then he will know it is not God's will; and he will not push.
I have confidence that Bp. Roy is not going to act unilaterally and without the help of the Holy Ghost. St. John says we must test the spirits. Bp. Roy is testing the spirits. No doubt about it. Should he? Yes, he should, and I'm glad he has done this.
But the ball is in God's court. God is squarely in charge of this initiative. God will decide what happens.
My prayer to the Lord earlier was simply to look at Him and think about the miserable pit into which we have fallen. To remind Him gently that if He doesn't help us soon, we really are going to perish.