First of all: As soon as you finish the strongroom no XP Orbs will drop in the rest of the dungeon. So you have to finish the entire dungeon, before you finish the strongroom to get the most XP out of it.
Is this intended? It wasn’t like that on the PTR.
Second: Didn’t the patch notes say " * Additional Experience Orbs dropped in a Forgotten Wisdom Nightmare Dungeon now scale better and behave more consistently." ???
On the PTR you made roughly 5% XP per globe.
Now you make roughly 1% XP per globe. Plus they don’t drop more or something like that.
What does “scaling better” mean then?
UPDATE from the 2nd try:
Just after finding the pillar for the strongroom XP globes stopped dropping in the entire dungeon AND strongroom…