Feldon 
From SmokeJumper on the EQ2 Forums:
Hey, folks,
We’ve listened to feedback and there were four areas we agreed needed to be improved to make the feature more useful. Below the list of those four major improvements:
1) The problem: People were joining the DF queue as “Random” and then declining group after group until they got the dungeon they wanted. The solution: If you queue and then receive a group invite…and then decline it…you will then suffer a 15-minute time penalty before you can re-queue again. This solution has no effect on people using the DF normally, but penalizes those that are trying to exploit the +25% bonus XP element.
2) The problem: Groups want to change their loot option but can’t in a DF instance. (Locked to NBG only.) The solution: All players in a DF group (not just the group leader) can now open the loot options and change settings. When those settings are accepted, it then becomes a “vote to change loot options” and all group members can vote on the change. If it goes through, then the loot options change.
3) The problem: There are too many level 90 dungeon options on the DF list. The solution: We still show all the level 90 dungeons, but we sub-divided those dungeons into three groups: Sentinel’s Fate, Velious, and General. This makes it easier to queue for the content you desire.
4) The problem: In low population times, players can wait in queue for a long time without knowing whether other players are queued or not. The solution: We now show low/medium/high population indicators for each of the archetypes that are queued for a dungeon. So, at a glance, you’ll now be able to see whether you need tanks, DPSers, healers, etc. and can either change your character to one that is needed, or encourage other players to do so.
We’re also probably going to tweak a few dungeons that should or should not be on these lists. (That’s still in progress. Details if we make changes.)
Once these changes are in place, we will watch and listen again and possibly do another round of changes. We know there has been discussion of group composition and other issues. Those are not being addressed currently, but they are not closed as topics. We’ll be gathering more info on those after these changes.
FYI. This is coming next Tuesday.