I think he's asking the wrong questions.
Just because there is a hole in the Marxist theory of social revolution, it does not follow that it has to be filled.
It is uncomfortable to think that we are not in a time of social revolution, but discomfort is no guide to thinking.
It strikes me that neither the symbolic analysts, nor the slum dwellers show much sign of universality. In the future, who can say? But now. No.