I personally feel that the stacking consumable just makes it feel and function too much like wrath stacks, which makes the tanks play more like each other which is something I would like to avoid.
I personally liked the porcupine idea and felt that it was very fitting for PLD because it directly plays off of blocking and the shield is the conceptual setpiece for PLD, that and it has the PLD attacking by defending which was something I brought up earlier as something I would like to see more of in the design of PLD abilities.
Mainly what I see as creating the dps disparities are as follows.
- WAR has attacks that ignore the Defiance damage penalty while PLD does not, with Inner Beast being the main contributor since it is used very often, hence my suggestion for Spirits to get the same and have that unnecessary "%hp reduces potency" part of it just removed.
- Maim can be kept up pretty much most of the time and it provides a nice dps boost, equivalent to what I would say Sword Oath gives PLD. Problem is that when both tanks are in their tank stance, PLD loses the benefits of Sword Oath while WAR can still have maim. That is why the porcupine idea is great imo, it provides that little bit of consistent extra dps like Sword Oath did, but is defensively themed. It is also separate from everything else so its numbers could easily be tweaked for balancing.
- The % slashing damage debuff for WAR. Yeah it can help both tanks when there is one of each in the group, but in 4-man content or solo-tanking it is a big bonus for the WAR and his party. That is why I suggested to finish off a 3-part combo from Riot Blade that has an effect like that, something like a % magic damage debuff or something that would make sense.
Pretty much I am trying to pinpoint where I feel the causes for the disparity come from and then come up with correlative ideas for fixes, not a complete and drastic change up of mechanics.