It looks like each of the Peterson sections has their own mobile HPG setup, a large NCSS, and can control 324 SDS drones. That gives the station overall a total of 6 Mobile HPGs, and 1944 SDS drones. That is a massive amount of communications and control capacity.
I'd be tempted to have the Generic Station module be a 4th type, where you have the existing X-Z types, and this 4th type would be the central core that has extra structural bracing to hold everything together. It would be the first component built to serve as the core of a future Peterson Complex, but still capable of operating on its own. It would have large amounts of cargo, excellent communications, and plenty of passenger/crew capacity to reflect room for the engineers responsible for adding the other components on. You could even add a 2.5 MTon unpressurized yard to reflect the scaffolding used to assemble and hook up the other components as well (using 62.5 ktons of the cargo capacity).
For its shape it would be a central cube, with a total of 32 doors. 4 for each of the facings to connect to the other Peterson sections, plus one door at each corner of the cube for after the full Peterson station is complete. Depending on the need, you would install any of the other three Peterson class sections. Install a Y axis station if you need more Dropship and small craft capacity, for large ship capacity you'd install X axis stations, and for assistance with long-charge routes you attach additional Z class stations.
To me, the axis class components provide almost too much capacity that is needed for a station. If practical, only the central node would have the vast C4I systems (and even then, primarily the military would be in control of those), allowing the other nodes to be cheaper and more focused on their respective jobs.
Still impressive though.
