Anytime I kill a boss or take a castle, the cutscene shows my faction, but it never increases.
Faction grinding is a chore. But it'd be less of a chore if I receive faction experience doing the things that I want to do.
They're already showing faction experience during the cutscene, I don't understand why they're not adding to it. I've watched the XP and it stays the same no matter how many bosses or castles I conquer.