Interesting ideas! In the initial concept, I did have plans to add a 'population' count to each planet that gradually increased over time to keep early-game planets relevant and provide a secondary objective, but I had to omit the idea for time.
I can totally sympathise with having to cut the feature - week long jams like these always lull me into a false sense of security with how chill they are compared to 2/4 day jams...