spacesuit and general space PPE design in the Microcosm is very much centred around generalised ergonomics, or the science of One Size Fits All
ideally there should be form factors and sizes for each with options for tailoring and that's the limit of it. very much also designed to cleanly integrate with other tech
the exomech is an extension of that idea and, for all intents and purposes, is a capsule with limbs connected to it, designed for industrial work in adverse environments
it isnt exactly comfortable but wearing a respirator isn't comfortable either
ideally the utility section would provide environment configuration for operator comfort and the seat may be more of a full chair rather than a simple pedestal, but the brutalist in me says people will survive
here is a nice diagram
the pressure vessel has sections that are able to be rearranged via bolt cuffs:
A is the vessel cap; there are two per end, and some can be twist-locked much like a spacesuit helmet
B is the head section with the viewing window and other visual assistant gear (holographic hud, relevant data readouts, etc)
C is the mid section and holds the control deck that's heavily customisable
D is the footwell section that provides additional control options via pedals, buttons etc