What does it mean for workers to collectively own means of production? Am I supposed to own only the laboratory I work at or everything everywhere? What if I decide to change a place of employment? Why doesn't owning it though the intermediary of the state and your representative in the communist party qualify?
Yes, communism eventually will not be run by proletariat. It will be run by the interests of the whole of society. If communism has been achieved then classlessness has been achieved.
If the proletariat have to wield an instrument of state power to smash their class enemies then it’s still in the transitional stage of the DotP