That said, my only real complaint is a general comment on the 4e core cosmology's Elemental Chaos: the thematic flavor and atmosphere of the elemental chaos seems schitzophrenic to me - do you represent a fusion of the elements, or do you represent the unformed chaos of limbo? The flavor seems to switch back and forth, uncertain at times if it's going to try to model itself upon the earlier conceptions of the elemental planes, or crib upon the 1e/2e/3e notion of Limbo. It's combining a lot of concepts that compete for attention, and it can't make up its mind which one it's trying best to be. I'm not sure how that's going to work out - but as I said, that's the only major complaint I can come up with for this particular section.