Good read, not sure what I think of the whole categories.
The founder beliefs I don't think I have much to add, the problem in them is mostly that some are obviously better than others and until they patch/buff/nerf/whatever any of them, you hit that nail on the head.
The pantheons are almost all situational. I would perhaps add a small category for pantheon beliefs you get when you don't want a religion but still get a pantheon. For example this is probably one of the only reasons I would get monuments of the gods or even a few other ones like faith healer, where they are really good early on, but once you start spreading it and giving it to other civs it becomes lackluster or useless. Perhaps there's a difficulty gap here since I play Deity mostly now, but Monuments of the gods is really kinda bad.
Other than that, I think you are perhaps overestimating the value of Building beliefs, or underestimating the value of some of the other follower beliefs. Perhaps because two of the follower beliefs you rate lowest, I actually rate very high. <.< More when I get the time to do a proper write up... Still trying to figure out the timings of religion, which are dramatically affected by both choice of Civ but mostly surrounding terrain and CS (which I kinda dislike)