Removing Tank Stance Argument

[Seraphor]

Fine, let me present this is a different way.

One tank, say... Paladin, doesn’t put out as much damage as Dark Knight, by default. (Instead of saying it has a trait that decreases damage, let’s just say it has lower potencies to its skills)
This Paladin, then uses the cooldown-ability Sword Oath, to boost its DPS for a burst phase. With this burst factored in, its overall DPS is back on par with DRK.

Then, look at Dark Knight. Darkside becomes a trait, pretty much as it is now. But Grit becomes a cooldown-ability that boosts defence for a period of time and alters the effects of a few abilities, such as Plunge, which under Grit has an enmity boost and lower potency. A similar effect could be applied to perhaps Hard Slash and Abyssal Drain or something.

There is nothing in there that says “decreases damage”, except for perhaps those couple DRK abilities but that can be accepted as the quirk of that jobs mechanics.
This is functionally identical to the system I just described.