It was mentioned in the dev stream a few weeks ago that SD is overhauling the station system. Personally I would love to be able to send only a few constructors to build a station, like 1 module to build the basic station and another for each specialization and then each addition to that specialization costs money rather than another constructor. I would especially like that if I could put 2 or more modules on each constructor ship.
So how this would work is build a constructor with 2 modules, send it out to build the station, that takes 1 module the second module allows the specialization to economic then each addition, the manufacturing, research, financial and approval components costs 100 BC each per level and autobuild for this would be great as well, with the option to uncheck autobuild if you are worried about your treasury.