Seems like a misguided attempt to break engineering the same way social sciences were largely broken; by embedding left-wing politics at their core so that their assumptions are not scrutinized and by substituting sound scientific method with literary analysis.
You're really missing the point if you think this document is proposing an alternative to engineering. It's addressed to a subset of artists and engineers deeply concerned with the political and interpretative dimensions of engineering.
While there is usually a technical aspect to critical engineering projects, most engage issues well beyond the scope of the "sound scientific method." See: CV Dazzle by Adam Harvey. [1] I suggest looking at Garnet Hertz's Critical Making for a more informed picture of this kind of work. [2]