Add a questing task that requires crafting a specific structure. Settings could involve fuzzy block detection or even allow any kind of block.

Example use case would be to guide players in making certain multiblock structures, like Forestry Greenhouse.

I know this would be technically difficult, but I feel it should be suggested.

I've been thinking of putting this in an Advanced Expansion at a later date but have yet to get around to finishing that. It's also quite a TPS demanding quest with 3D scans of the area surrounding the player to be made every so often.