Your fundamental argument relies on it even being possible to peacefully go against the ruling class and bend the state in the favor of the Proletariat. This assumption leaves your analysis dead in the water. Combining that with a failure to analyze Capital to any meaningful degree, and the failure of analysis as regards the ever-increasing complexity of production and the benefits of central planning, means you're left with the equivalent of universal healthcare in a Capitalist economy.
A good idea, no doubt, but will always be undermined by the ruling class, and thus is both incomplete and not a real solution.
Why ia "balance" a good thing? It wouldn't make sense to jump straight to a fully publicly owned economy over night, but gradually fold in more sectors and firms as they develop, starting with all of the large firms and key industries. If you don't take control of those, then you won't have actually risen above the Capitalists.