Currently buildings sit around, help out a bit, and get destroyed by people who have loads of structure killers. I think it would be good if you could build gun turrets to
1) help defend against attacking fleets
2) draw structure killers to attack them, instead of the factories and refineries and stuff
Otherwise your buildings are just cannon fodder to evil people who took sadistic pleasure in annhialating all your buildings.
Also I had the idea of introducing a 'James Bond' sort of agent to covert-ops who would be
1) Very expensive, however
2) does loads of damage (i.e. takes all of ure resourses
3) Hardily ever fails
4) you only get one and if he dies u et no more
5) Sometimes gets delayed in returning home because the enemies has caught him or he has gone of to make love with some random women, this means that covert-ops involving him cannot be carried out until he returns.
But I don't expect you to think that that last idea is good, cause it is pretty ludicrous
, but I think the first idea is good, hope u do too