DRK issues are here, but not to the point of making the job bad or unplayable by all means. The real problem (shared with WAR) is that PLD is flat out better at everything right now, making the two other tanks a bit underwhelming to play compared to it.
The second problem with SB DRK is that in 50 and 60 content it feels so gutted and lacking that it's not feeling good to play. Heck, it don't feels good to play until level 66-68, when you can really begin to play with the blood gage. That's why I'm avoiding playing under 66 content with my DRK right now, and that's a big issue I think. But for endgame, no prob.

Still, 70 DRK is fun to play, but a different kind of fun than the HW 60 one (which I still prefer). There still is the button mashy feeling of the job, but now it's centered more around mashing Dark Arts than multiple oGCD.