Despite the ridiculous leveling curve, what's odd is when you get quests for certain dungeons.
For instance, I just reached level 13 and a new quest popped up for Kishinden Hell mode, a level 21 dungeon (and harder than some dungeons around that level). Normally you'd expect to get a quest for a level 21 dungeon around 18-19 at the minimal, not 8 levels below, and at this pace.
This probably means nothing but I'd thought I'd point that out in case someone thinks of something about it.