OK, quick thoughts:
If you want to echo the design of the Abydos, my first idea would be to consider converting the two "ribs" on one side into structures akin to the "ladders" connecting the core to the outer ring of the Abydos. Probably, they should meet in the middle in some kind of structure, so that they appear to have a purpose rather than just existing for existence' sake.
The main structure is, at this point, still pretty simple, so it's hard to give useful feedback. More detail is needed, but that's not going to help you too much since it doesn't tell you where to put it.
I'm guessing that you built that part of it mainly from a single, squashed sphere, with some extrudes? Or something like that, anyway. Possibly consider rebuilding it from smaller subobjects? It's easier to build in a lot of detail that way, and you can reuse UV Mapped subobjects to add a lot of detail quickly.