Wow, almost two whole pages while I asleep.
Anyway, my biggest concern over the sealed Soul King is something that I brought up in a previous thread the last time we had this topic. The Soul King is not maintaining the entire Bleach-verse at once with his presence. We have from
Yhwach's explanation that the Soul King is maintaining primarily the Soul Society, and the other dimensions are stabilized by being connected to it.
With Soul Society becoming unstable, the other dimensions that are connected to it become unstable as a consequence of that. This can also be inferred from the difference in the effects each dimension has after the Soul King's death.
The Seireitei immediately begins crumbling apart but the Human World only has a mild, long-lasting earthquake.
The Soul King is the keystone, so take him out and the Soul Society is destroyed. As a result the other dimensions are destroyed too - so the current justification in the Google Docs that "The Soul King maintains the collapse of the Bleach cosmos" doesn't seem the most accurate to me.
This is another bit that's only really relevant for the Mimihagi scaling, but
Mimihagi only begins to stabilize the Soul Society after it physically joins up with the Soul King's corpse. It's possible that Mimihagi by itself wouldn't be able to do anything to stabilize reality but joining forces with the Soul King's corpse it gains that level of power. We also know that corpses can be used to stabilize the dimensions via Yhwach's corpse after the war. So this could explain how Mimihagi was able to stabilize everyrhing while the other limbs of the Soul King don't appear to be nearly as powerful.
EDIT: And this is another matter I want to address, just because I'm a bit confused, but why is "stabilizing a dimension" equal to creating or destroying one? The "flow of souls" that disrupts dimensions does not seem quantifiable, and I don't see anywhere that it is implied that the amount of energy required to stabilize a dimension is equal to the amount of energy required to destroy it. It's like saying that the energy required to keep one domino from falling over is equal to the end result of every domino in a chain falling over.