Remember that it's a lot easier to speak in defence of war or pld tanks since theyve been out 2 years now (4 if you count version 1.0)
And drk has been out what...5 days? With no actual raid content to speak of this isn't too factual at the moment and should all be taken in stride. I haven't taken my pld or war past 50 yet but I can definitely say that drk has a place in tanking that's on par with what's out there. But like all classes it needs to be understood to be used properly.