I think...it would be a good idea to have buildings outside of the dome.
A building that you can hold in your bays and deploy on the surface of a planet. the building can be moved around like a turret, unlike the biodome.
The Buildings could all do different things like, one could increase moral/hour by .5 or pop/hour by 10. Lets say it can even increase harvest on a specific recourse, and another building could lower pollution/day.
The buildings would be deployed anywhere on the planet, they can be replaced, destroyed, and moved. Only downside about using this is that you would take up space on the planet so you would have less space for defenses.
now who like?