Coming from a facilities maintenance perspective, pay attention to maintainability.
Filters have to be changed, pumps and such have to be replace, repaired and serviced.
Belt drives wear out, gears get fouled (especially in a dusty environment), etc.
Consider space for access ladders, platforms, hoists to lift up equipment and lower down equipment.
The shell of the container creates a barrier to entry which helps protect against environmental issues, but also requires access doors to ingress and bring in/out equipment.
Unknowns are all around you like what does this equipment work like in a different atmosphere, with different gravity? At least make a head-nod in the plan and diagrams to a pump/equipment room, access issues, etc. This would go a long way towards making the modules look more realistic.
Why have a separate half shell on ITS? Would you consider making the side wall (top half) of the module the outer skin of ITS and have it be removable/replaceable. This makes access to the module much easier. The residents can use sheeting temporarily, and then material constructed on Mars from these other chemicals to enclose the open modules. The half shell is could then be replaced on the ITS and returned to Earth, saving the weight of double walls. for that matter, the whole module could be more like a ribbed cage which has sections for securing the wrapped wall material which will be constructed on Mars. This saves a lot of weight.