[Suicide Junkie]

About the 'easier way to get population of different race', I do think migrations shall be allowed during partner kingdoms, just like USA and UK. If players could upload some population while download same amount population, AND not making that planet dormed, that shall be allowed.

Trading for a race that breathes the same atmosphere accomplishes nothing except make your people angry.

You can't undome any new planets, and you suffer from the "alien population" happiness penalty.

About the 'interceptor and bomber classification' I mentioned on Last message, I've tried to edit game data (based on Prportions mod) to achieve it. Simply two major concerns:...

Adding (or removing) supply storage to the fighter's hull (in vehiclesize.txt) would solve the first problem.
The second problem is easily solved by adding restrictions to the components. One-per-vehicle would prevent someone from adding both types of engine.

If a planet isn't building anything, it's either well developed (filled all facility slots) or not given suitable instruction yet. I would like to see new planet status icon that represents 'no space yard there and all facility slots are filled with highest tech buildings'. Then I may just sort them and pick the planets without that icon.

Can't you just sort the colonies by facility slots used, and then just scroll down to the empty ones, and deal with whichever ones have no black-and-yellow construction in progress icon?