Thank you!Yeah.
Look, the idea of England as a long-standing bastion of anti-Papal sentiment is... well, a myth. Yes, lots of people in England hated the Pope. Just like lots of people in France hated the Pope, lots of people in Spain hated the Pope, lots of people in Germany hated the Pope, and lots of people in Italy hated the Pope, including this guy Dante who you might have heard of, who insisted that a large number of Popes were presently in Hell, stacked on top of each other, and waiting for the new guy to come. There wasn't anything unique about this--popes were frequently pretty easy to hate.
The fact is, no, Harold isn't starting some sort of proto-Protestant Reformation in this scenario, whatever the Pope did or didn't do regarding William. You need printing presses and increased literacy for that baby to come about, and they aren't coming for awhile.
Getting real sick of every TL, no matter how well written, assuming that England is destined to end up at perennial loggerheads with Rome and the Papacy. Hatred of Popes has been a Catholic tradition much longer than a Protestant one, after all
More seriously, the purported papal blessing is, IIRC, somewhat debatable in its veracity prior to the invasion. Even if it were absolutely real, it's not like the Pope ever, oh I don't know, supported or engaged in military adventures where he lost and still came out with considerable authority, right?
On more political questions, do we have any more firm ideas on how relations between peoples on the British isles will change as a result of continuing Anglo-Saxon rule? It seems to be generally agreed that the Anglo-Saxons will be less interested in interfering in Ireland, though the question of Wales, Scotland, or internal minorities such as the remaining Cornish and slightly more Danish English in the north would be dealt with. Most TLs seem to go down a what-might-have-been road where England is more diverse and less imperialistic within the Isles, but how realistic would we say that really is? I can imagine this Britain being more focused on the North Sea trade and so getting into more conflicts and entanglements with the north German, Dutch, and Scandinavian states relative to OTL, and this could potentially be enough of a distraction to keep them from going after the more marginal territories left independent on the island.