The discount on waypoints appears to have only been 28c for the shortest distance. >_> I don't know if it scales or not.
They should make it a full dungeon. I'm not exactly sure how "explorable" paths work since I've only done story dungeons so far, but honestly the game could desperately use a Caverns of Time. I know fractals are supposed to be fragments of the past or something, but a full dungeon that addresses all the god-lore would be nice.