Agreed. Though I'd like to see more of the standard Federation "tower" assembly underneath the central sphere, ala Spacedock.
EDIT:
Stoopid mobile internet - the last picture I saw before posting was the spacedock from Trek2009... I really like the above concept by
Mojomoe though. I would make a few minor changes though:
1) eliminate the spikes from the outer arcs, they detract from the flow.
2) if that's a fusion core ala DS9(1) on top, I'd move it to the bottom and direct the exhaust out away from the core. If not, and they're just red navigation warning lights below an Ops spire? I like it a lot

3) the outer curve on the glowing fan blades (what are they, anyway?) I'd continue all the way to the base where they meet the station rings, as right now they look a little too alien, IMO. I'd probably cull the majority of the glow also - maybe replace it with rows and rows of viewports?
4) the interconnecting spokes that are bowed right now, I'd maybe switch them out for straight ones.
5) It may be worth considering making the core MUCH bigger, although not necessarily completely spherical (I also like to think O'Brien would design a central core with a huge internal "open air" recreational/arboretum area in homage to Keiko, or possibly on an upper level with massive viewports)
Aaand I'm spent. Overall I really quite like it - just would apply some tweaks.
Of course, personally I'd have preferred DS9(II) to be either a Starfleet/Bajoran collaboration, or solely a Bajoran design built with Federation funding support!
