I don't know how the crisis ends, but the "Sedevacantist Solutions" section of your article is a mess, I'm sorry to say.
Some comments:
As a general rule, I’ve found sedevacantist leaders and public figures do not spend much time proposing solutions to the crisis.
Why is it our job to propose solutions?
They, are instead, more focused on converting Catholics to the sedevacantist position, which is, essentially, that all Vatican II popes have been invalid and, therefore, not “true popes.”
Some do this, and some don't. Really, it's a mixed bag.
Sedevacantist apologists typically deflect the issue of resolving the crisis by arguing that any solutions outside sedevacantism necessarily require the admission of a defected Church, which, of course, is impossible.
I don't see why sedevacantism implies that the Church has defected, even though this is often asserted online. In my opinion though, the non-sedevacantist position does entail a defected Church, because it requires that one think the Church cannot be trusted to give us the correct religion.
I will address this argument later. However, the question that these sedevacantist leaders must ask themselves is as follows. Let’s assume a hypothetical situation where sedevacantist apologists are wildly successful and convert 90% of Catholics to their position, what then?
Sedevacantists who attempt to explain the crisis by arguing that every pope and bishop since Vatican II lost their office for heresy are in a quandary.
This is not my position. I do not believe every see in the world is vacant.
This position leaves no way to elect a new pope since there would no longer be any College of Cardinals.
I'm not persuaded that the College of Cardinals is in fact extinct. But even if it is, it's not as if the Church would be unable to elect a pope. Go see what Bellarmine says on a papal election without cardinals.
In fact, this is the very reason why the sedevacantists do not currently elect a new pope themselves. They rightly admit that they have no such authority or designation to do so. So where does this leave the 90% of Catholics who just became convinced of sedevacantism in our hypothetical? It basically leaves them at a dead end.
Seemingly a dead end, perhaps. But so what? It's not as if calling Francis the Vicar of Christ somehow makes things any better. On the contrary, that would make everything immeasurably worse.
The fact is, I don't have to solve every mysterious aspect of this crisis to be comfortable in my judgment that Francis isn't the pope.
Have a blessed Easter!