My several cents:
DRK is cool, with some minor tweaks easily making it my favorite. Dark Artsing skills to do different things is a cool mechanic I think is underutilized by the class.
Lessen the TP drain and make a few things more internally-synergistic: Dark Arts effects and skills could use some tweaking to work in a more fluid way. The evasion bonus on Dark Dance is bad and, even though I like all three in various ways, the three AOE skills don't come together like I think they should. Especially with DA in the mix. Finally Delirium should have a second debuff that gives it OT utility that isn't overwritten by the monk.

One thing with Paladin is that they don't really get the option to do a pull with some kind of big "enmity buff" on Rage of Halone. Sure they have Fof, but compared to unchained/zerk Butcher's Blocks or DA Power Slashes, it's not much.

Its lovely and all that PLDs want to do more damage. The question is, what do you want to give up in order to get it? They do less damage for a reason. They do have more basic physical mitigation than the others through blocking.