I think, first of all, that you're full of crap. 99% of economics is not "free market" - the higher you go in economics, the more you learn of the limitations of perfectly competitive, costless information models (especially if you attend a Saltwater Department). Furthermore, while the name is unfortunate, it was derived from French students who based in solely on the entymology of the word (autism was once a synonymn for schizophrenia and is occassionally used) and the students who came up with "Post-Autistic economics" were using it in this sense:
Medical Dictionary wrote:
autistic thinking preoccupation with inner thoughts, daydreams, fantasies, private logic; egocentric, subjective thinking lacking objectivity and connection with external reality.
http://medical-dictionary.thefreedictio ... c+thinking
I admit that it's unfortunate that this ladden psychatric term came to be associated with "autistic spectrum disorders" in a very confusing way (the single-minded thinking of people on the autistic spectrum is almost always nothing like the disorganized thinking of psychotics), yet is still used in the French language to denote subjective "out of touch"-ness, but language is screwed that way. I guess I'd like if they changed the term to avoid confusion to something like "realistic economics" or "reality based economics".
As for the actual merits of the ideas, some of them probably have merit (I currently occupy the borderlands between the left fringe of New Keynesianism and the most "moderate" edge of Post-Keynesianism).