BF quest items and monsters are placed randomly on the third levels of the dungeons, so it is possible for any particular dungeon to have none, one or multiple items or boss monsters.
A lot of people assume there is something wrong when they encounter an empty third level, or are at least disappointed that they fought their way to the end of the dungeon for nothing but the experience points and random loot. If Larian does something similar in DD2, hopefully they will put a boss fight in each dungeon, even if it is not quest related (or even better, refine the BF concept so it is more than just a set of dungeons).
