[Mylon]

On huge domed planets, the facility slots fill up pretty quickly and you have to destroy a settlement to build a city, which can take many a turn without a space yard.

Medium freighters + Population Liner III can only hold 1M, still. Having to get module IV or so is a bit much to research just to double what you can do with module I.

Yet another hardcoded problem I noticed: Space yards make the penalties trivial. A colony with 1M population can build at 2000 per resource per turn.