It really bugs me that the temple has that much livable space on the interior, even with the Rebel additions. The design of the structure seems quite clearly to be little more than massive disks of solid stone with voids between each one supported by the sloping stone pillars. It always struck me that it was like the pyramids in this way, a structure meant as a symbol of power and awe rather than a useable base. I imagined the Rebellion made do with the space between the stone disks, with only the ceremonial room on top as part of the original livable structure. Also, the massive Rebel complex seems at odds with the small rough and ready force we see in the films.