With the change back to weaponless ships using no maintenance, I've had two games in a row now where a computer puts small defender ships with zero weapons on all of his planets. While this is a good tactic to stop a spore ship from just flying in and nailing your planets, the production time it put into it made it easy pickings. My original plan wasn't to go for them, but I couldn't resist when all i saw were planets with a token ship in orbit. I play with tech trading turned off to help preserve the custom tech trees, so i have no way to know if the computer AI decided it just didn't feel like getting any weapon techs or what. Needless to say, his entire civ (of roughly 14 planets) was gone before he even had a ship that could fight back. As a side note, in one of the same games, the Korath had an absolutly unstoppable military for the first half of the game. So I don't know what would cause some of them to just not care about defending themselves.