Let's examine each dlc/expansion of this game and their rewards:
Imperial City DLC: The first one of the dlcs you could purchase back on the day. What did it include? A new pvp zone with two dungeons, pretty decent.
In order to collect the best rewards you had to farm on a pvp/pve zone with really hard zone bosses meanwhile you were hunted by other players, who wouldn't enjoy this?
The best helm you could get (and it wasn't a 100% drop like nowadays) was the Molag Kena one, and believe me when I say that Molag Kena was nothing like the new one. People used to reach the final boss and they couldn't complete the dungeon or it took hours to them, and that's just the final boss. Quite challenging and pretty decent rewards.
Orsinium: The second DLC. New zone, new quest, new rewards. A dlc focused on pve and questing mostly. Well balanced sets and a new crafting station. What could you get with this DLC? vMA weapons. How do you get them? COMPLETING THE MOST CHALLENGING SOLO EXPERIENCE OF THIS GAME, many can't even complete the vMA once, specially the new players. As a reward for your big balls you obtain a RANDOM TRAIT vMA weapon. Just one (you may obtain more if you enter on the weekly boards but meh)
Thieves Guild: Pretty much like Orsinium but without vMA, Maw of Lorkhaj added and pretty decent sets for PvE. Great story tho but no real unbalancing content.
Dark Brotherhood: Pretty much like thieves guild. No real unbalancing content added.
Shadows of the Hist: Two new dungeon with pretty decent sets. Challenging enough compared with the rewards you can get.
Horns of the reach: Same than SoH, challenging dungeons and decent gear drop. In my opnion, the best looking and usefull monster sets comes from this dlc.
Clockwork City: Enter the dlc, it doesn't matter if you play using the Windows Speech Recognition tool, just join one of the trillion groups doing the nAS and farm THE BEST WEAPONS ON THIS GAME IN 10 MINUTES, OVER AND OVER AGAIN, no real challenge even in VETERAN. Aren't you happy with your drop? DO-NOT-WORRY!!! change the trait as much as you want to the desired one; you just need 50 crystals (it will take 2 hours at the most to farm that amount of crystals).
Oh you can also access the stations to craft the MOST OP PVP SETS AVAILABLE! and that doesn't end here! do you think you are pretty tough since you play with vMA weapon? Let's nerf them, so if you would like to keep rolling you have to purchase this dlc, or at least a sub.
Fanboys bear with me,
Enjoy,