We have "no tech trading" as a game option. I'd add a few more:
1) No tech brokering. You can sell you own techs, but can not resell techs you bought from a 3rd party. Upside, minors and allies can not resell the nice techs you sell them. They might still be obtainable via espionage and invasions.
2) No sensor stacking. Sensors currently stack, would block the Eye of Sauron cargo ship with 22 / 30 / 36 visual hex range.
3) No colony razing.
4) Choose Colony Capital placement. So you can place it where you want.
Making these game options (as opposed to requiring mods) would make far more people happier than choosing one or the other.