Why do people keep saying that getting your one piece of loot for the week equals a complete lack of incentive to stay in the dungeon? You're forgetting two incentives that are always present, whether the gear is acquired or not:

1. The dungeon is fun!
2. 200 Philosophy Tomes(The most any one dungeon can give right now).

Only these incentives are "cappable":

3. 50 Mythology Tomes.
4. 1 piece of loot.

So... while you're pining for your piece of loot, go ahead and get Darklight for Alt classes(or your main, if you're missing anything). Once you get your gear, finish the instance for a few more Tomes.