Right now, there is little compelling reason to run a dungeon, while leveling, even once, what is going to happen once most of the players have their characters in the veteran levels?
A game's launch is usually the golden age for low-mid level dungeons. You catch a lot of people as they are leveling.
This always lessens just by virtue of fewer players as the game matures, but usually the gain you get draws people toward running dungeons. However, in this game, There's not a compelling reason to run them past the first time (and I hear a lot of people just skip them entirely).
I'm wondering what the long term implications of this are. I'm envisioning a scenario where, past the first few months of release. It will be very difficult to find a PUG to run dungeons as we're leveling.