I think you're on the right train of thought but missing a key aspect. I'm with MLs that without some sort of organized counter-authority, existing power structures will overrun the revolutionary forces. But that authority needs to be fully accountable to the people it serves, otherwise it will become disembodied and "institutionalized" in the more specific sense, leading to a power structure that justifies its own existence instead of deriving the justification through the people. MLs, to me, are missing this power analysis. They seem to try to argue that an authoritarian communist-party-run government has this accountability to the people by the fact that...they serve the people? That's not enough. You need to organize your revolution around accountability, around the idea that institutional power must always be justified by the will of the people and not the other way around. The Zapatistas understood this, which is why they built their governance around consensus-building and have since actively removed institutional power as it no longer served the people.