Please make tri quality meaningful.
It should be implemented as a kind of belief focus for our characters, at the cost of a large amount of XP to select or to change that focus.
If a character decides to guide his life by the pursuit of essence, vitality or substance, that should influence his development somehow. Firstly, this focus would give a RNG bonus to the chosen quality dimension of the item during regular quality grind. There should also be a few skills/hearth magics only available to people dedicated to a certain belief. And that focus should grant the player some significant effect, such as walking speed, HP % multiplier, or LP% multiplier, for example.
This could be applied to kingdoms as well. Upon foundation a Kingdom could choose to be ideologically neutral, or to orient itself by a certain kind of principle, which would then branch out as a set of policies it would have at its disposal (to enact with the realm auth pool). As mentioned before, it's simply not right that the potential kingdoms of Emerald City, Ivory, Dis and AD be literally the same for the vassals in-game. Essence, Vitality and Substance-focused kingdoms should be sufficiently different from one another that a random player says "I'll migrate to X because they offer what I want and fit my playstyle".