Dungeon Finder leaves an open group finder menu, so you can see who is joining your group. The reasons
I suggest this is:
1) Some flashpoints and heroics can be done with 2 or 3 people, we don't need a full group for them all (Esseles and Black talon)
2) It would be nice to talk to team members first so I can ask if we are "space-baring " through content. If we are then I would like to leave the queue.
Even better than leave queue you can specify skip this group ... that would /almost/ make things usable for planetary content.