I play higher levels and never use them in any kind of map, but in small and medium maps it could happen i use attack/defense modules on mining starbases. Actually the cost of a well developed military starbase is so high that i prefer to build starships.
I think, talking about tactic, military starbases represent the general idea of giving a terrain advantage in a game that present a homogeneous territory and they should certainly be more powerful and more developed. The weakness of a tactical element in a game is easy to identify: if you can build somenthing when you don't need that something anymore it means its tactical impact is nullified.
My ideas:
1) I like constructors for starbases. It means you have to bring materials from a planet in order to build stuff on your bases. It's ok, it's a kind of realistic. But i also think the need for constructors for every single improvement on a starbase it's crazy. I would like to see a starbase-bar that allow you to put some of your money in the developement of all your bases (maybe with an "off" button in the detail screen if you don't want to upgrade a particular one). You should need constructors only for some milestone improvements and then let your money flow out and see your bases became jewels.
2) Military starbases should give you default advantages since the very beginning and:
- the two planetary defense improvements (that i never use so i never remember) should be instead starbase modules and planetary defense should be researchable immediatly after space weapons.
- military sb should give a tactical advantage to troops fighting on a planet in their influence area. A very good one, worth the high price of such a iron garbage in the middle of deep space.
- the range is too wide. I would like to see a narrower range but, if a battle happens in this range, starbases should be a part of it. It would mean, under certain circumstances, you can bring your enemy in your territory at your conditions. This will justify very much the construction of a military sb close to a planet.
- when you destroy one of your military sb (or any other sb) you should receive in exchange money or, better, some constructors. It makes sense: if you dismantle a sb you can use the old materials to build a new one. Maybe not everything but a lot (weapons for example, etc.).
All in all a tactical option in a game is worthless if it's not a balanced alternative to the other tactical options. And military starbases are clearly too expensive for the advantages they give you. Talking realistically, i think military starbases should be less expensive or more powerful in order to be a worth tactic. Until this doesn't change i won't use them because, as Lyvonia said before, fast fleets on your borders (with eye of the universe i would say) are the best defense system in the game.
richard
p.s. i think military starbases should be a priority in future patches because the question of "terrain effects" on battles is missed in GC and, whether is a core charachterization of the original game concept or not (i suspect it's not, due the fact someone actually introduced military sb), it would a great improvement to have, so to say, the option of battlefield tactics.