Been a tank since 2.0 beta and I love the playstyle, but after reading so many post about tank DPS and just tanking in general I now want to throw my 2 cents in the pool with the suggestion that the tanking stances should just be adjusted and traited so that tanking would play like a pre-lvl30 tank, also no tank DPS stance. Adjustments made would remove damage penalties but make it so that tanks would still be defensive without losing our funk. Change I've thought of so far this this...

Paladin: Shield Oath(Trait):Reduces damage taken by 10%. Increases enmity from enmity generating skills/abilities.

Warrior: Defiance(Trait): Increases maximum HP by 25% and HP recovery via healing magic by 20%. Increases enmity from enmity generating skills/abilities.

Dark Knight: Darkside(Trait): Reduces damage taken by 30%. Increases enmity from enmity generating skills/abilities.