You're telling me stuff I already know man, trust me. The only pieces of Star Wars lore that I don't know inside out are the immediate post-galactic hyperspace war, and the Draggulch Period. The reason why I assume that Bane is the original creator of it now is because, if I remember correctly, practically all solid lore prior to the NSW is considered 'Legends', and in the cartoon, Bane explicitly says something about redefining the sith code, etc. I haven't even been keeping up with the universe like that (because of the eu destruction), so as far as my knowledge goes, Revan doesn't even 'exist' anymore.