Relatively new to CK2, compared to other P-Dox games, and decided to become a Fraticelli while playing as William the Conqueror. After much blood, sweat, and tears I've managed to unite the British Isles under my rule and have converted the majority of the population to the Fraticelli heresy. My MA has gone above 80% and I just sacked and conquered the Papacy after causing the collapse of the HRE by helping get a heretic member of my dynasty installed as emperor (thanks, ERE alliance!).
However, even though I'm sure that my MA is now quite greater than Catholicism AND I own Latium outright, it seems that I am unable to either declare my version of Catholicism as the One True Way or even appoint my own Religious Head as a way of legitimizing Fraticellism. Will I ever be able to?
Also, what happens to the Pope and Papacy now that they are landless, apparently? Do Catholics still even have a Religious Head anymore? I didn't get a message stating the Papacy was re-founded somewhere else and I haven't gotten any message about potentially uniting the Catholic Church.