Better concept?



Planets produce X, Y, and Z resources modified by planetary modifiers, Pop count, Pop traits (e.g. habitability), investment, and developement score.

Over time all planets' development score will grow, thereby pushing them to produce their maximum potential (again, limited by Pop count, etc.). This maximum is increased by technologies, like Mining Networks 2, planet size, etc.



Unrest, bombardment, and other factors will permanently reduce development score (think tile blockes) (which will slowly recover as per normal developmental growth rates). Extreme methods may also reduce max development score. This would represent permanent destruction of usable land, but perhaps that's better suited to just being subsumed in the "Its now a tomb world" or planet cracking systems.



You can invest into planets to boost their development (think, clearing tile blockers or build nice factories), with diminishing returns for higher development planets. Things like Hive Synapses or Paradise Domes or whatever that you would logically build everywhere, will slowly, after researching the tech, have their bonuses be incorporated on said worlds.



You may designate some amount of special monuments to planets like the art monument, which cuts some % of their max development (because it's taking up space), but adds a different output. Other examples. Fortresses, Planetary Shields, Military Academies. Basically, anything that you wouldn't build 100% everywhere.



You may choose upon colonization, and at any other time, what the focus of said planet is. It will slowly shift its development and output in that direction.





Edit: visually, I think the tile system can remain, so you can see which pops are where and what their ethics are, but tiles would be designated "industrial zone" etc, and the specifics of which buildings or tile resources were present are irrelevant. No need to shuffle Pops around ON a planet. Their traits are amalgamated for best output of the given resources.



Resettlement still a thing.