You are the one who brought up the quote about von Hildebrand. Now you want to run away from it.
My assessment of this article is that Marra is trading on von Hildebrand's name for authority. But von Hildebrand is a very questionable authority. He was busy promoting personalism, both before and after the council. After Vatican II he was willing to admit that other people had made mistakes, but he never retracted his own contributions to the mess. His widow is still busy going around promoting personalism, and trying to pretend that it is compatible with traditional Catholicism.
As far as the hair-splitting on papalotry, I have to agree with the neo-Catholics on this one. The pope can't go around making indefensible decisions, even on prudential matters. His every word should be carefully measured, and his every silence, for that matter. Catholics should be able to trust that he is acting for their best interest in all matters, not just questions of dogma. I'm afraid that trust has been shattered, at least for the time being.
Why is personalism incompatible with Catholicism?