I really think a mechanic change to defensive planetary structures should occur. They simple are not worth building (a problem in this game generally, lots of things aren't worth doing as they hurt you like advanced farms, etc.)

I think if had a starbase influence area, then they would be worth the investment points. It would also make those class 4s in a system with 15+s worth. I think this also makes logical sense in that same reason huge bases are on the outskirts of major towns. It would make sense that a Mars like planet would be a great staging are for a solar system defense while leaving a bustling economic planet like Earth unfettered with the cluture and hassel associated with such bases (defensive structures)


Such strucuters would be the fleet creating one would add all ships in all orbits of all planets in area as a fleet. Makes logic sense that planets in close proximity would help defend each other. Same with the other benefits (of which I can't even remember as they are so worthless to build.)