(source) Making the tanks different is very important to us. If we can keep DKs in a spot where their health and mitigation might be a little lower, but cooldowns make up for it, then they play differently from other tanks. The most boring solution would be to give everyone the same armor, health and cooldowns. Then all you're really getting is different art for your character, and of course the community would move on to resource mechanics or threat generation as the next reason they're getting benched.