I have found (maybe it’s not true) but most of the classic dungeons are pretty barren, would it make sense to add some 10-15% bonus to exp while hunting in them?
1% per keep owned by your realm. An additional 1% if a guild has claimed the keep. 5% per relic, including your realm’s own relics. 20% camp bonus, doubled in dungeons. This decreases every time a monster is killed in a camp, increases back up to its cap when the camp is unused. 30% frontier bonus, this includes DF and the RVR dungeons. 20% BAF bonus per additional mob on pull. 5% per unique class in a group.
I'm not sure how much that camp bonus is translating to overall XP, but either way, there should def be an advantage to dungeon crawling (whether it's the above XP bonus, better drops, etc).