Indeed I think My Colony 1 was a victim of insane power creep / or was just shifting towards a more city-building game instead of a micro-management game.
A slower pace will make it more realistic along the way. Compared ton MC1, a lot of things should be scaled down, buildings' number of workers, production, population...give more space to the survival-micromanagement aspect rather than the city building tycoon mode is important I think.
I don't know if colonizing other solar systems should be a priority now. Maybe in a far future update when the game is well established we can think of multiple planets in one server/game but now is a bit early.
EDIT : oops bast said "There will of course be support for multiple planets on a server"
here. I'm having a hard time keeping up with all of these discussions.