I've been avoiding declaring population control on my planets I considered "done" because I was worried about wasting the growth potential. This lead to me doing a ton of resettlement. However, I ran a short experiment, and the vast majority of your growth is turned into emigration. It seemed like about 0.3 growth is lost, but all other growth gets turned into emigration, and 0.3 growth is completely insignificant (That's about 1 pop lost per 333 years). After setting my dozen or so finished planets to population control, I noticed that my other planets just about tripled in their growth from immigration.
Once you have what you need from a planet done, use that population control button so that growth can go to more valuable places. I didn't test it, but I imagine the egalitarian version does the same, but is a bit more expensive and you actually get to keep that 0.3 growth. This can greatly reduce the ongoing micro from planets you acquire. In my current run, I have a full ringworld and one that's three quarters done, and all my research is there, my consumer goods and alloys come from habitats, and all my planets are exclusively mining (with one world that's a trade center). Now that I've figured this out, I don't have to touch any of my planets again, and even if I was egalitarian and only discouraged it, a new pop wouldn't grow for something like 300 years.
Once you have what you need from a planet done, use that population control button so that growth can go to more valuable places. I didn't test it, but I imagine the egalitarian version does the same, but is a bit more expensive and you actually get to keep that 0.3 growth. This can greatly reduce the ongoing micro from planets you acquire. In my current run, I have a full ringworld and one that's three quarters done, and all my research is there, my consumer goods and alloys come from habitats, and all my planets are exclusively mining (with one world that's a trade center). Now that I've figured this out, I don't have to touch any of my planets again, and even if I was egalitarian and only discouraged it, a new pop wouldn't grow for something like 300 years.
