Blueprint drawing mode.
One simple, yet super-useful feature that's unfortunately rare in these sort of games is the ability to draw right on the map. Plan the location of your roads and buildings-- even if you haven't unlocked the building yet. It's a tool that just lets you draw rectangles on the ground. Simple, yet super-useful for making sure everything all fits together.
Rimworld has this feature, if you want to see an example in action.