I read somewhere about making use of the (0) class planets. I thought maybe having military outposts on worlds could enrich the game a bit.

You could take a transport with troops on and set them down on (0) planets as miltary outposts. They can do research on the planet to trigger mega events such as finding ranger class ships.

They can also take off again to invade nearby planets.

The befit would mean at times of peace you don't have transports just hanging around and if you land them on an outpost planet they don't just get destroyed as easily as usually do.

The outposts can also increase your territory which leads me to another exspansion I would like, namely... the ability to send ships and fleets to "patrol border" and "seak and destroy" any enemy ships/fleets that cross into your territory.