I understand. Let me explain what I was thinKing in those terms specifically.
The idea was to make tank and healer DPS small enough that is comparatively inconsequential compared to DD DPS. DDs become more powerful, but weaker in defense requiring more support from tanks and healers. Healers may have better output, but with fragile DDs they need to focus on healing more, tanks too need to help with mitigation where possible. So both healer and tank end up sharing the load of party support in addition to their primary role, giving DDs a clear road to do their thing.
You identified a problem with the homogenization of damage dealing in FFXIV, I think it's a big problem, because it really diminishes the power and role of DDs.
Imagine battles where PLD *has* to use cover to protect a BLM or SMN, or perhaps even a DRG, whereshields and other mitigation effects from tank/healer skills are absolutely needed to mitigate damage on DDs so the healers can keep up. By making DDs more fragile, it's more important that the tanks hold aggro andpick up adds, so they have better aggro multipliers. Pushing DD DPS higher and otherrole's DPS lower, you create the differentiation that makes each role special and different.
If healer/tank DPS is low enough, they will not be able to prevail without DDs, and so they must protect the DDs, heal them, and even raise them, in order to complete a fight.
