I did cover this idea before but I wanted to try again since i left way to much in the way of interpretation and I don’t think i left it as a complete thought so, here goes-
We Bring back the orbital round and it’s launcher, and we make sure to use it requires a decent amount of on-board resources. (CPU,PG, maybe cap) it also holds the ship in place when used because obviously it can’t make the shot while being able to move. only holds five rounds at a time with a rapid light missile reload speed.
so i waltz up and target lock a planet, engage the orbital rounds, and what happens? RNGeezus decides. it determines whether it hits a colony, it decides what colony that is and it selects one node. that module now goes into a 24 hour reinforcement period. during that time the node is unable to be contacted. think of it as a stun. if it hits a storage area you can’t move your stuff, if it’s the spaceport you can’t launch stuff, if it’s a factory or extractor it stops producing, and if it’s the command, the whole thing grinds to a halt. if all the nodes on the planet get deactivated (like if an alliance would be that determined to carpet bomb some PI) it tells you accordingly. it allows the PI peeps to get some in space harassment that everyone wants to see, it allows whoever is shooting at your planet to be relatively vulnerable provided an orbital round launcher taxes heavily enough on the ship.