Just to address your first paragraph here. The association with augmentation has roots in Posthuman theory and also the concept of the 'cyborg.' The idea is not limited to weather protection, both in theory and in design. It is a common theme amongst many 'techwear' brands. To say weather protection is the 'functional core' of techwear is shortchanging a lot of its foundational ideas.
I think everyone gets the point when Errolson says we are already cyborgs. Our phones and wireless technology compress our experience of time and space, leading to a mental reality that defies physical boundaries. But what I don't think is as easily discernable is the fact that techwear brands sell a less potent fusion between body and technology, bringing to the forefront an idea of clothing as an 'interface' between us and the physical/metaphysical spaces we inhabit. This is especially pertinent in 'non-places,' a term Andrew Bolton cites via Marc Augé in "The Supermodern Wardrobe"--interstitial spaces symptomatic of contemporary life defined by transience and a lack of importance/identity like subways, hotels, malls, to name a few. Acronym's gravity pocket lets users swipe transit cards seamlessly. The back-mounted escape zip on the J41-gt provides a new doffing mechanism and changes the way we inhabit space seated in vehicles. Softs's ghost sweatshirt and SISP use a drop pocket that allows for quicker/better storage and access in crowded places like packed trains, moving crowds, etc. 'Articulation' and movement is also a 'supermodern'-pertaining augmentation as it alters the emotive sensation of a garment--it literally changes how it feels to move, and movement through non-places is one of today's primary concerns. This isn't new stuff. Earlier work by Vexed Generation is all about navigating and mediating contemporary urban nonplaces (Bolton talks at length here more eloquently than I ever could).
To shift topics, I think much of the recent discussion surrounding the space is overly general. To discuss Acronym, Guerrilla-Group, Veilance, etc. in one grab-bag when it comes to techno-orientalism is incredibly problematic given their cultural/formal references, process, and output are entirely different (How is Veilance even part of this discussion lol). You could go so far as to evaluate piece by piece. The design process and execution are different on each and every one, after all.