Integrated Information Theory is certainly not panpsychist. I would argue that IIT certainly allows for top-down influence as well as bottom up, but I argue that it requires the Von Neumann formalization to really account for this. If you are not familiar, Integrated Information Theory is essentially a mathematical model of Emergent Interactive Agency from social psychology that was argued for by Bandura. The idea was of reciprocal causation. The indeterminate micro causation gives the emergent definite state conscious agency of Integrated Information Theory to be truly emergent and causally effective. Essentially, if the microstates are fixed, so is the macro, but since in quantum theory the micro is not fixed, the emergent definite macro state of consciousness can exert causal power on the microstate through probing actions using the quantum Zeno effect.
Some of us older fogeys believe in a world of causality that can be described. The world gains comprehension when the data patterns are understood, especially as we develop better tools such, as advanced Bayesian analysis. To me, saying something is emergent, is to say the actual causes and their relations are still unknowns. The word has a correct usage: for something to emerge from data by means of understanding the patterns, is in the context of epistemology. New information about old or current facts causes the emergence. Emergence is a verb only in cognitive knowledge (mutual information) at agents.
Talk of emergence as an ontological "force" is problematic. Instances are usually replaced; as science discovers more of our structural reality and inter-relations. Is radioactivity an emergent property? Not after we understand half-life in atomic physics. My favorite book defining emergence and how it can be best understood is R. Batterman's - Devil in the Details.
IIT is an effort to quantify the functional signalling in the brain. Like all math, it speaks not to analysis, but only to data patterns from empirical results.
As for your analysis, I am interested to understand. I am pretty well-read on Stapp's exposition of Von Neumann and his take on mind.