Hey,
Don’t know if it has been posted before, but I guess that it would help to increase the enjoyment of the game if there were a metal system that encourages longtime motivation; like a mix of w3 and w4 mining. At the moment, after some days, the first people have metals, but since iron and other metals can be found really easily, the progress is too fast. It would be nice if iron, copper and tin were almost as rare as gold or silver; i.e. very few caves have natural metal nodes you can mine. You would have to work in order to get metals at all. As it is now, you can just go out, prospect, find either copper, tin, iron or a mix, but if metals were rarer, you could really slow down the progress and add to the enjoyment of the game.
Just an idea