Hi,
I would love to see special buildings per planet type.
For example a "Ice Crusher" or so on a ice planet.
This ice crusher could process the ice of the planet to extract additional vespene from the ice.
Or a steel factory on a sand planet to increase the metal output further.
Every planet type should have a special building to provide a resource bonus regardless of if it already provides an additional bonus by the type.
This is also about diversifying the buildings a bit more for the planets which currently only can have the same buildings on each.