Yes. I also dispute it and have disputed it for a long time. +Sanborn's explanation seems to indicate that Universal Acceptance will provide sanatio for the legality of the election but not the fact that he actually holds the authority of the papacy. +Vigano is not making that material/formal distinction.
The entire idea of a cabal of freemason Jєω homos constituting a proper conclave, i.e., a corporate agency possessing the ecclesiastical authority to add determination to a subject, i.e., to validly elect a pope, is confusing at best.
The thesis posits a valid election which ultimately fails because Jesus Christ refuses to impose the supreme apostolic authority on the "pope-elect."
But where does the thesis discuss the absolute necessity of there being ecclesiastical authority in the body of electors? Bp. Sanborn refers to the reception of the form of the papacy, the reception of the supreme authority, as a "further determination;" and the election/acceptance as a "determination."
Both a determination and a further determination are superadditions that require agency power. In the case of determination, agency power to dispose to receive the form (men wielding ecclesiastical authority to call a conclave and elect a candidate). In the case of further determination, agency power to impose the form on the disposed matter (Divine delegation).
Where is the discussion about the agency power of a corrupt cabal to determine a papal candidate to receive the form of the papacy? Is not this agency power itself ecclesiastical authority? Is not authority required to dispose a subject to receive authority?
Think about the "college of cardinals" Perp Francis has assembled. When he croaks, will they actually constitute a real conclave? C'mon!
None of the hundreds (thousands?) of individual clerical automatic excommunications have ever been sentenced by the Church. Yet this army of apostates is effectively wielding a purely human authority to destroy the Church. And in truth, one of the most dangerous and destructive employments of this human authority, is the setting up of fake popes by fake conclaves.
The very conclaves are fake.
Are not the elections of John XXIII on down themselves invalid? Is there not a question also about the matter, in the matter-form hypothesis? If we are going to use a compositional model, then let's look also at the indisposition of the matter, starting with the election, let alone the acceptance.