The overuse idea is not really good from my perspective since players need to use resources at first and since there is not much to do in the game right now the corruption/warp/etc. won't progress. So passive environment worsening is more preferred from my perspective.
The competition for resources is also not relevant since resources are everywhere in the game. to make it work the ore overhaul is required. My idea is that its getting harder and harder to get the same resources since environment is getting worse. And it will require more cooperation and equipment to achieve the same result (like mine the same amount of ore form the undergraound)