What do you think of MHTS, Bishop Sanborn, and their whole cassiciacuм thesis? I find it very... contradictory.
Lad is all for the Thesis, specifically Fr. Chazal's variation of it.
My take: I, personally, am unsure. I think it's a plausible means to explain HOW to get out of this rut with the Vacancy, but I find it difficult to accept as a position in itself. As with MHTS's version you're still saying that the See is
Vacant (hence their dogmatic non una cuм position), but that Francis & co. are basically "Pope elects" with the temporal power of the Office; whereas Chazal's is saying that the See
is occupied, but the spiritual authority is impounded.
At the end of the day, you're still either a sedeplenist or sedevacantist.