Yeah, that is basically how I think I had it in my head. That somehow, the Onta and the physical world are like separate, but connected 'layers.' The Anagogis perhaps modifies the Onta through the physical world, while the Psûkhe modifies the physical world through the Onta?
That does make me question how a Chorae works though, since in my head I had what was the (certainly mistaken) idea that it 'locked' in place both layers, in relation to each other, i.e. if both frames don't match, nothing will happen. Perhaps that does still sort of work, even if it most certainly is a fundamentally flawed idea.
Actually, wait, what if the Onta is simply what everything is comprised of? Then there is no difference between the physical world and the Onta, the former is just the tangible aspect of the latter. What is difference is the frame of reference. For the few, they see both the tangible and the fundamental at the same time. I guess a real-world analogy would be like seeing both as we see now and the quantum-mechanical nature of everything, at the same time.
Perhaps the Mark is the soul's inability to resolve what is and what should be. So changes to the Onta, to the sighted, are fundamentally wrong, because both frames of reference do not match. While blind to the tangible, the Cishaurim suffer no dichotomy. Their soul only 'sees' what should be. Perhaps this is why it is magic of 'passion?' Because you must truly believe that what you do is 'how it should be.'
...I'm not even sure what I'm talking about now...