In my opinion, the problem with dungeons in this game is that there is no real reward for running said dungeon unless you are doing so as part of a rather large grind with an eye on armor sets.
My first character was an asura elementalist, which in my opinion have alot of nice gear skin options from the various armor sets. My next was a norn warrior, and I was very happy to run CoF p1 over and over and outfit him with full berserker armor the moment he hit 80. I’m now working on a human guardian, and literally the only armor set that doesn’t look like a tin can is the arah heavy armor. Now, I have no problem running arah and working hard for my kitten armor. But doesn’t it seem a little silly I can’t find any reasonable motivation to want to run anything else? Oh great, I just did a dungeon. I get 5-6 blues. Whoopee.
There’s no real reward unless you are actively grinding that particular armor set. Seems like a pretty badly designed system.