It would be to perform a significant nerf on missile bases. They're a favorite for players who like to "turtle" and not have to worry about building ships until they reach a technology level where they can roll over the AI (who has spent time investing in ships in the early game). It's a really lame strategy that has absolutely no basis in science fiction. Show me any mainstream sci-fi novel/movie where an invading military force from space was driven back by planetary missile bases. It's absurd and completely unrealistic to have non-ftl missiles climb out of a planet's gravity well (which takes a lot of time) and then somehow have them travel through nearby space and successfully track down ships with ftl engines and laser weapons. Even missiles from the ships would be more powerful because they can be aimed at stationary targets and are moving down into a gravity well. Here's what I would do. On the ship combat screen, all missile bases have a range of 1 square. This allows them to be used as defense against bombing and military transports, but otherwise have no other effect on ship combat. This will allow a military fleet to swoop into an unguarded planet, take some losses while knocking out the bases, and then control the planet. This is not only realistic, but it completely eliminates the turtling strategy and forces the player to, you know, actually play the full game if he wants to win instead of just a small subset of features. If this makes bases too weak, they can be toughened up with increased armor and/or shielding. But the reality is that an unguarded planet should be child's play for an enemy fleet in orbit.