But beyond all of that, my original point was this:
What is the functional difference between a god and what the Engwithans became? There doesn't seem to be one to me. They behave as gods, they are worshipped as gods, they are gods. The "big secret" is that they derived their power from the turning of the Wheel. But like I said, people still believe in the Abrahamic God despite Him killing tons of people in the flood and in the Egyptian plagues. If the Engwithans merely said that the souls sacrificed were wicked, sinful souls, wouldn't that be enough for most of the kith?
If you are talking about God as it is understood in real life religions, the entire point is precisely that God is NOT actually a relative kind of being, something that is still woven in time and space.
St. Agustine argued that God could not be corporeal and that he had to be exist outside of time and space. According to Aquinas, he is Being in the higher sense, not such or such a being but Being as such, and everything that "is" exists only by virtue of God being Existence in and of itself in it's absolute essence.
Consider that for most of Christian history it was forbidden to actually despict the Father, meaning that something like Michelangelo's Adam would have been considered blasphemous. God is the "I AM THAT I AM", he cannot be anthropomorphized.
In a seemingly "polytheistic" religion like Hinduism, which appears to have many "gods", the Abrahamic God would be closer to the Atman, and most religion also have a conception of such an absolute, "prime" principle, whether it is the One of Plato, The Tao, the "Great Spirit" of the American Indians and so forth. Even Buddhism, which appears to be a non-theistic religion, also has a conception of this supreme reality or principle which they refuse to define precisely because to define it is to limit it, but the "void" of Buddhism is nothing other than the "holies of holy" of Judaism, or the "hidden treasure" of Islam etc.
Because most fantasy settings are created by dirty hippies who have no clue about any of this, it is not surprising that even when they admit to the existence of divine entities they envision them in terms that are purely relative, and it is not surprising that Pillars, which wants to be "adult" and "mature" in respect of previous fantasy settings, wants to dispense even of that.