I know, you can turn off Super Abilities, but I like my Super Breeder.
Can't have one without the other. If you want your people to screw like bunnies, you'll have to defend from the spore ships.
And besides - you might think it's unbalancing to have that ability, but once you play as the Korath, you realize how tough it is to use
those fancy new planets and how fast your economy TANKS because they have NO population whatsoever.
So, in reality, the spore ships have their ups and downs, and are really quite balanced - and easy enough to avoid.