I'm not convinced about writing off a blood DK build for PvP. Sure it is not going to put out sustained dps like the other two specs, but PvP is not about sustained dps, its about burst. Blood has always been good for burst and with improved death strike and DRW it s still going to be good. The only trade off is that you will have huge survivability and miss out on a couple of the spec related snares. As a bonus, if anyone actually decides to attack you, you will start to generate stacks of vengeance which will put your damage on par with any of the dps classes. Again, all theorycraft here, but would be cool if one of you guys in Beta could look into it