It needs some sort of docking point (a physical one) no matter what- even if we abandon almost all of physics, you can't pull up to a station, get out of your cockpit, and phase through a wall ('cept for Vince Piccio and Renato Bianchi, but they don't count). Larger ships don't have to go inside the station itself (they moor outside), but they do need a place to send shuttles to. Watch the opening of "2001: A Space Odyssey" or the bit immediately after the credits of any episode of "Babylon 5" if you need to get a feel for how docking on a rotating object works.
Also, I'm with Unseelie on the biodomes- they should all be pointed at the sun, and even if the station is aligned coaxial to the radial line from the star, they would be flat and not pointing every which direction. If it is rotating (and it looks like it should) then there should be a gyroscope type thingy keeping the biodomes pointed at the sun- we've got artificial gravity, energy shields, antimatter weapons, fusion reactors, and all kinds of other stuff, it'd be weird if we didn't have the sort of technology that already exists in the real world. The only reason they'd be pointed like they are now is if the station rotates but it's impossible to adjust the biodomes- something that sounds more like a limitation of the game engine rather than one of capabilities inRP. If that's the case, it might look better with the domes flat.
As for the positioning of this particular station model, Freeport 9 does get a decent bit of traffic, and is inRP a bit bigger of a trade center than it ends up being ingame- though Freeport 11 certainly gets far more visitors... just not traders, usually. Specifically I'm referring to "visitors" like the Harbinger (remember this?). It's survived a -lot- and is the definition of frontier station. It's right in the thick of the BHG-Order war, in addition to any Nomad attacks, and while the Zoners wouldn't have known that when they built it the first time they've had to make plenty of repairs in the past few years. I'm sure that some of those repairs would have involved arming it to the teeth, or if they went for more passive defenses it would be quite heavily armored. It might be a population hub, but it's a population hub that lives on the edge and needs to survive everything that gets thrown at it. This doesn't look like the sort of thing that would survive that- especially if it's 4x the size of a current Freeport. A version of this that's bristling with guns or well armored and generally less fragile-looking would be far better suited to Freeport 11, methinks.
Since it's a test station only with the potential of dissappearing how about putting that where the old FP 7 was in Sigma 17? If it turns out bad then the Nomads or Wilde can wipe it out again for rebuilding what was previuously swept away.