So pop growth is pretty busted in various ways. It doesn‘t make sense that an empire population should suddenly grow faster because it had more space. Colonizing low habitability worlds and resettling the pops, effectively using them as incubators is another strange and probably unintended result.
To solve those issues: make pop growth global. Then have a localized system to determine where pops grow or migrate. This would help greatly with various abuses of the system. It would help smooth lucky/unlucky starting positions. It would help making tall empires more viable.
Side note: Maybe robots could still use the current system because they are not so much bound by luck to find habitable planets, they could feel more unique that way.
To solve those issues: make pop growth global. Then have a localized system to determine where pops grow or migrate. This would help greatly with various abuses of the system. It would help smooth lucky/unlucky starting positions. It would help making tall empires more viable.
Side note: Maybe robots could still use the current system because they are not so much bound by luck to find habitable planets, they could feel more unique that way.