I disagree. Blizzard has been very clear on why they are not including RDF. It takes away player engagement by auto assigning you into a group and teleporting you to the dungeon. This was bad design. That being said there comes a time in each release where there are fewer and fewer leveling players and it is difficult to find players to dungeon with. It would be nice to see an option for a cross-realm group finder for those times where you can’t find a group.