What talents are currently bugged for DK's (especially blood)

Never played a DK before and wanted to give one a try. I want to start off playing Blood spec but I've been seeing stuff saying that Dancing Rune Weapon is broken along with other talents. Is this true? I was using DRW on a dummy and it seemed to be working fine (doing roughly 50% damage), but maybe I'm wrong. Any other talents that are broken?

Thanks for the help!

It's likely that DRW does more than it should considering retail data from world of logs, but outside of that there doesn't seem to be anything that doesn't work for blood/other specs. It's not impossible to find some obscure bug, but if anything is present at all, it's very minor.

Go ahead and try dk, the specs are bug free sans DRW to my knowledge.