Did they nerf dungeon XP recently?

[Kaurhz]

The amount of EXP you get for a roulette is relative to the duty that you get whilst in that roulette.

For example, if you queue for MSQ roulette and you get Praetorium then you'll get significantly more EXP than if you were to get Castrum.

The only other thing I can think of is the armory bonus going from 100% > 50% when you hit level 80. But I cannot remember if both dungeon EXP and roulette EXP were unaffected, or whether it was just roulette EXP.