The greatest problem in the Catholic Church today is Modernism. While usually a concern among Romanists, it is a chiefly Protestant concern.
While it is easy to simply accuse the Ecclesia Anglicana of being disobedient in the Reformation, she actually understood the needs of her times and the demands of virtue.
Defenders of papal supremacy and the Solus Petrus hermeneutic often point to Jesus giving Peter the keys. However, the text of Scripture shows that Peter isn't given the keys separately from the other apostles.
While Rome tries to the appeal to the Scriptures to justify her supremacy, she has to contort and add to the Scriptures to make it work.
There is a clear contradiction in being in communion with an heretic, even the Pope. Some try to save the position by saying Jesus deposes the Pope. Here's why that only creates more contradictions.
If Popes can be heretics, but faithful Catholics cannot be in communion with heretics, then what is there to do? Back in the 14th to 15th centuries, the Church found a solution. Is it still tenable for a Roman Catholic today?
What happened to Apologia Anglicana? The old owner is a now a Papist?
Benedict XVI saw both the Novus Ordo and the TLM as equal expression of the "lex orandi". Francis teaches only the Novus Ordo? Who is right? And what even is the "lex orandi"?