Currently, at late game star base defenses are really weak, so weak that it's not even worth arming them, and what's the fun in that?
Therefore, I would like to propose for DA (if it's not too late) a relatively simple feature to balance the star bases.
What if for every generic module that added, the star base gained 1 HP? And for any defensive or offensive module, the star base gained 2 HP? In this way a fully upgraded star base would be far harder to destroy, and star bases with more upgrades would feel more massive and unique. What do you think?