Yes, I was trying to draw the analogy, but I agree it wouldn't be an active agent at least.
But bringing back to where we came from: The problematic part to me is still whether a deterministic universe is compatible with free will. I mean, I don't think they're compatible, but you said it depends on whether an omniscient agent exists. I still don't see how that follows. If the omniscient agent exists, and it is indeed an active agent, then by definition the universe wouldn't be deterministic, no?