Because, despite all the problems it has, it's still an incredibly fun class to play, and I can't see myself going back to the other tanking classes after falling into that delicious DRK groove. Is there a problem with being able to like a class, while still acknowledging the serious flaws it possesses?
No, it's not. Name a single relevant thing that DRK offers in either the MT or OT role that's better for a party than what WAR or PLD might offer for endgame content.
Additionally, I do not want to see DRK with LNC cross class skills. Blood For Blood would lead to a legion's worth of terrible dead tanks, and a horrible reputation for DRK players that would never see them get another party outside of duty finder again.
