Lately I've been playing with the old star wars games(Xwing series and Rebellion) and thought that there are lots of stations that could come into ICW.
Golans are nice and all, but they are only equipped with anti corvette or bigger ship weaponry and some bomber groups can really do some damage against them.
There are the 6 Platforms in X-Wing Alliance which could serve a simmilar role to the Hand's Brask. You already use one of them in Ascendancy, so it wouldn't really need much work to port it to ICW. And to make it differ from the golans more, it could have anti-fighter weaponry only, since they were armed with laser cannons only and no turbolasers as much as I know. As an addition, since there is 6 versions of it, there could be some variety between New Republic, the Warlords and the Remnants. I know this is a lot of work, but the end result to bring at least one in would worth it. both gameplay, player choices and variety-wise. Like for a world able to build up to 5 stations like Kuat it does not need a Golan I next to 2 Golan III and 2 Golan II. But an anti-fighter station with more fighter groups could perfectly fit there, filling a gap.
My second idea is related to income.
There could be a space station that sacrafices defense capabilities for income. There is no need for golans 3 jumps away from any enemy planets. But income can always be good, especially if you are a warlord and have limited resources. I suggest making the asteroid mines buildable for the warlords, so their small territory could still produce an income good enough to make building up your forces possible. It wouldn't need much work, since the model is already in the game. Just require some coding.
On the ground, there could be more difference in income. OK, I know there are already two methods, but the only difference between the mining facility and the Tax Collection Agencies are minimal... Well, except for the Hand.
But 5 imperial factions having the same TCA is not the best idea... So i think the PA could move to a new building which would relate to trade, so it would also make a link to Ascendancy, where the PA has very good trade upgrades.
Also for the other warlords there could be some minor but more important difference in the Income, like Zsinj using TCAs, but cost slightly more, limited to 4/planet but would give a slightly larger bonus, while maldrood's being unlimited, cheaper but give a much smaller bonus.
Eriadu could use Mining Facilities for sake of some difference, but with different parameters from the NR's and Hand's version.
And I know that the DL is not even a third, but actually an 8th wheel, but they could have Mines too, since they had a thriving metal industry if I remember correctly.