Add more tools for the player to build with
- More jobs to have colonists place, remove, upgrade. Building block-by-block is tedious past the early-game.
- Allow players to start with dirt/leaves in early game, and then ask their colonists to upgrade it to wood / stone when those materials are plentiful later-on.
Add a "Blueprint system"
- Blueprint system allowing players to quickly design elaborate builds in a 3D editor overhead view with more tools
- Could probably get modders to build these for you if you use simple enough data structures to store the build info
- Players can place blueprints and have colonists build them in-game, so they don't have to place block-by-block.
- Creates opportunity for additional community interaction, workshop content, etc.