The problems I mentioned in the last post about how many Austrians want to talk about Austrian economics, I mean. So it's not just some concern I am making up because I disagree with the conclusion. I (generally) agree with most Post-Keynesian conclusions. But a lot of them have the same sort of issues (it comes with heterodoxy to a large extent). They want to talk about broad underlying concepts that they assume everyone else misses instead of the actual model and the actual empirical tests of the model.
I am very lucky to have taken my Macro Political Economy class with a Post-Keynesian that cared a lot about the models themselves, as well as the empirical literature on the models. Imagine a class on Austrian macro co-taught by Roger Garrison, Gerry O'Driscoll, and Andrew Young. It was like that for Post-Keynesian economics. You don't get that with all Post-Keynesians though.