While I was playing the Beta I noticed that the surveyors will go after anomalies even if they're out of the ship range limit.
I also had an idea. Once you capture an enemy planet instead of just getting the planet you would get an event similar to when you colonize a planet. You'd get three options and each option would give you ideology points. Like releasing the survivors, enslaving the survivors, ransoming the survivors, or simply executing them. And instead of giving buffs to the world it would effect the other races opinion of you based on their traits.