I think that’s a terrible idea.
If the bonus from these random structures are too good it will incentivize people to only play with good seeds. I think it’s better kept mediocre.
I don't think that's much of a concern, I'd expect most people to use random seeds in order to get a different experience each run. Besides, is a size 7 colony really too good? It's not like size 6 colonies are so bad that one size more would radically change your fortunes.
It’s something otherwise unobtainable and breaks economy if you will.
If you’re running pather-free inspection-free and 0 SP upgrade, size 6 sits at a delicate balance.
Think in the opposite direction, if it’s not that good why would people demand it and many posts littering around asking and sharing “good” seeds?
Just like people trying so hard to get hupershunt tap working makes me laugh so hard. I had to assume they were using some indevil stuff that takes so many industry slots, 5th industry is otherwise not remotely useful in base game.
That said I wouldn’t mind if Guardian fight itself provide better loot, but cryosleeper really should be left something people can live without.