I've thought about this off and on for the last few days, I do want to simulate weirdly-shaped ships, but at the same time, making everything unique would be maddening. I think that, for the most part, I'm going to keep Spaceships rules as written.
But individual ships might get weird features to make them feel interesting and unique. One side, however, will have a specific design feature for their capital ships to allow for additional forward/side firepower, while limiting their aft firepower.
Their ships will be dagger shaped. <plays the Imperial March>