I was looking forward to DRK in PVP for a long time, so hyped.. First day of Seize patch I went a whole 3 matches as DRK..

then switched back to DRG/PLD and never looked back.

There's a whole bunch of issues either relating to MP management or burst potential.. too much micro for inferior results.. Blood Price / Blood Weapon have limited use outside of scripted PVE. Push Back is a shared CD, not DRK specific. AOE PVP actions are not ideal, no utility like PLD, no Holmgang / Hallowed Ground.. As much as I don't like saying it,

DRK is not a PVP friendly design. You'd do better with any other tank or melee DPS. Any impressive results you get you probably would have gotten even better rolling a different job.

I'd love to see a DRK or 2 prove me wrong - that'd persuade me to try the class out again. But so far, all DRK encounters have been nothing impressive. Just save your defensive CDs for that C&S, but even then that's a weak burst if they don't have MP to follow up with other high potency abilities..