Shield Wall 40% damage reduction for 12s, on a 5 min CD. Feint 30% damage reduction for 7s with NO CD 20 energy.
Guess which does more damage a Rogue keeping up Feint or a Warrior in Shield Wall.
Moonkins, Hunters, Shadow Priests... 15% damage reduction 100% of the time with no Damage penalty, and in fact for some of them it's on an ability that increases their damage! But warriors have to gimp our damage output by having almost no Rage in Dstance to have that 15%.
The real joke is playing a DK with conversion, keeping it up in Blood Presence feels like playing a Warrior in D Stance, except on the DK you have 2nd Wind at 100% health, and oh yeah 20% more health.