I appreciate you taking the time to reply and share the diagram, it's clear you've put time into this. However, I don't think my view disagrees with Scripture; I believe it helps make better sense of it.
One logical tension I see in saying "Before the eons there was no spacetime": "Before" is itself a temporal word. It assumes a sequence of moments. If God deliberated, planned (Ephesians 1:4, 2 Timothy 1:9, etc.), or even simply "was" in distinct ways prior to creating, that implies succession in His experience, which is what we mean by time.
God isn't bound by our physics, but that doesn't mean His life is a static, timeless block with zero duration or change. God upholds all things moment by moment (Heb 1:3, Col 1:17). He enables change, succession, and "nows." We're riding in the clock He sustains, not the other way around.