I dont understand any idea except the last one: A station can be moved if DS9?
About the first one, I think that u mean that nebulas could be done so that when u fire at a certain nebula u cause an explosion in it-if thats what u ment I think its a really good idea

Also this was in A2-behemoth of species 8472 had a special weapon that did this so it is doable. I really like it
Second idea: Do u mean u can build ships and stations at your planet colonies? If so I must tell u that in FO there are no colonisable planets and even if they were I belive that that couldnt be done, sorry