How do new players figure-out what a military starbase does?
I like the new windows that explain each of the many screens that new players will encounter (planet, shipyard, research, etc.) even though I think you need to add a tab to the Options screen to allow toggling these off and to allow players to see them again on demand.
Perhaps you could add some similar windows that explain what each of the different types of starbases do. I have been playing for a long time and I am uncertain about what military starbases do now. I am happy to see you tweaking various aspects of the game to make it more interesting and enjoyable to play, but you need to explain the mechanics to players to help them develop strategies and avoid the frustration that comes with ignorance of how things work.