So I can't speak to that. I've known Joe Schwartz a long time. His intent wasn't to make a reformist critique of revolution but of what he sees as unnecessary authoritarianism. One could legitimately argue about that.
DSA as a whole is somewhere between the leftmost wing of social democracy and what "Draperite" Christopher Phelps once called (in a different context) "the rational wing of revolutionary socialism." In a country with no mass socialist movement, not even a pathetic reformist social-democratic party, this not-wholly-desirable broadness is probably inevitable if one wants to have an organization of more than 1,500 people. (DSA has 8,000 or so and is growing. Of course, the US has 315+ million people so it's a drop in the ocean.)