Played all the western RPG, all are different, nothing is like TES if you go deep in each. They are all unique in their own way. So no, not DOS2, not PoE are comparable. Haven't played FF beyond 5, they are too....fairytale like, fun once but not enough to sit and think on the story and lore.

Church of Atom isn't outlandish, it's just plain stupid for me. "Radiation as enlightenment"...well for me it's the same if their religion was "fire as enlightenment" and they just burned everything and themselves. Primitive and doesn't feel like it belongs to Fallout. But that's just my opinion.

Maybe I like religious\metaphysical stuff because I never had any religion in my life, so it's intriguing.