[Fyron]

One thing that can be done now is to use Space Yard Expansions to get multiple Space Yards on a planet (as in mods such as Pirates and Nomads, Adamant, and GritEcon (at least I think GritEcon has them...)). If you set the initial Space Yard facilities to have a low construction rate, you essentially need a lot of Space Yard type facilities on a planet to build large ships there in a reasonable time frame. You could also add a special ability such as Boarding Defense to them, and add weapons that target only planets, and do damage only to Security Stations. I have no idea if that works, but it might... This way, you have special weapons that can eliminate only Space Yards. Alternatively, add Resupply ability to the Space Yard facilities, and the existing Smart Bombs can be used for lightning strikes agaisnt construction worlds...