I was thinking about whether different stars would give some bonuses to the income of the starsystems. Like a dysons sphere could give +5% industrie and a neutron star maybe +5% sience. It would be interesting for the sytems, because some stars could give you better bonuses then others. Some stars could have anomalies wich would make your system feel more naturally. With that there also should be some new techs to research, like removing bad anomalies or even "terraforming" these stars.