Home stations, upgrades, defense and more..

I like the idea of build able and upgradable stations.. But outside of the main game. I think they would a good fit for endless mode, have just one galaxy to defend against increasingly hard waves of enemy fleets, but you can can build and upgrade the defence in each sector and send defender fleets around. Would be a good use of all the extra scrap you acquire by the end when you have obtained your perfect build for the core fleet.