Nemui.naomi

Before a capital ship factory is built on at a planet and you select the grayed out symbol of the capitol ship building category it gives the error no frigate factory, instead of capitol ship factory.

I would agree that there economical player would have several short comings in this game as of yet, and that more options for income and possible mineral extraction would be great to increase the diversity of the game. Perhaps the concept you suggested or a hybrid of, either way I think you're onto something.