I understand, that this is too hight tech for haven mechanics, but why not.
The thing we need for lategame:
Transfer big amouts of ore,coal; process big amount of resources; plant big amount of plants - is such annoying.
I offer an endgame technologies work on steam (fired coal + boiled water), and trolleys, which will allow:
- Build some steam engines for tools (like authomatic loom, quern, winepress, etc.)
- Build steam engines for trolleys, which allow transfer large amount of ores
- Build rails
- Build mineholes that support rails between levels
- Build some steam mechanisms that allows, plant/harvest multiple seeds.
That will require large amounts of steel, wrought iron.
This will be also a reason for other players to gather around the developed infrastructure, and build bigger villages