Well the thing is that I think that attacking Kantian autonomy as the only autonomy is short-sighted, and I specifically argued (in my $ winning paper) for an apophatic understanding of autonomy in relation to heteronomy, and in Nietzschean understanding of strength of will(s) rather than this "rational control" of the will that Brassier is going after.
First, clarifications.
I don't think Brassier is attacking Kantian autonomy specifically, but a range of autonomies derived from a certain philosophical rationalism, such as Descartes and Kant. As he says, he's targeting the "fetishized" notions of autonomy. This clearly tells us that Kantian autonomy isn't the "only" autonomy; but it is certainly an exemplar as far as Brassier (and any respectable philosopher) is concerned.
I'm not sure where you're getting "rational control" from, or why you're quoting it.
Second, definitions.
I have little knowledge of what an "apophatic" autonomy would look like, as I'm unfamiliar with your paper (which you can email to me if you want, seeing as I'm not done with final papers and final grades). I'm familiar with negative theology, but not negative autonomy. In negative theology, God is construed as "Nothing," because God transcends being. Analogously, I'm assuming that in a negative autonomy, autonomy is nothing in any ontological sense because it does not partake of
being but is rather of Nietzschean
becoming (this is all based on the conversation we had and my very simple and limited effort to set negative autonomy parallel to negative theology).
Autonomy, in a moral and individual sense, is defined as structure being given from within: that which is determined by a moral agent consequently subsists as the justification for its own absolute givenness (of course, ideally there should be some correspondence between what an individual judges to be morally or aesthetically pleasing and what is, "objectively," morally and aesthetically pleasing).
In other words, autonomy is not only freedom from the wills of others, but also an intrinsic power, or capacity, to justify one's own actions from within.
Third, interventions.
Brassier resists the term "autonomy" because he sees the notion of self-determination as being at odds with some fundamental aspects of human behavior and the relationship between action and some kind of interior specter that we might call "intention" or "cause." He would not align autonomy with Nietzschean becoming because, as autonomy is defined, it requires some kind of preexisting agent or cause to set it in motion. Human subjects are not in control of becoming, but are determined by becoming (this informs his intervention into the notion of "free improvisation").
In a way, I could see this as a kind of negative autonomy, but I'm sure it doesn't jive with what you have argued. "Inverse autonomy" would work better for what I'm describing; rather than autonomous drive, or will, giving rise to action/becoming, it is only action/becoming that determines the specter of a purported subject-who-determines. The phenomenon is retroactive. What we perceive as the effect actually precedes what we perceive as the cause. We do not possess autonomy, but exhibit something more like automatism with a delayed consciousness that, through a neurobiological sleight of hand, retroactively pitches an autonomy back into the past.