The quests have been redone in Turbine's new and "improved" (ugh!) linear style. That generally means you can do only a few quests at a time, and these must be completed before the next batch of quests are made available to you. If you continue doing the quests you see in the Waterworks, you will eventually be directed to all of them, including those at the Great Wheel.
Originally Posted by The-Walrus
I'm not sure why Turbine has chosen to make their new quest lines linear. I prefer the old method.
Mandelbaum, 105 Champ; PeabodySherman, 100 LM, House of Mooters, Landroval
Rembandor, 85 Champ, Penquanta Periannath, Laurelin