I personally LOVE this idea, as complicated as it sounds. The one thing that prevents me from sitting down for more than an hour is the loneliness. At some point, you get tired of sitting there alone listening to the sound of carnivores, etc. I always have loved games that introduce a multiplayer concept because it opens up so many more doors for players. In this game especially friends can now play together, form separate tribes that intermix or kill off the competition. Additionally, people interested in RP could easily accomplish this goal using a simple chat feature. I know this concept would take a while to implement but I know for a fact that the existing community would love it and that it would also greatly expand the community. It could be a 3rd option separate from story mode and sandbox so that the people who prefer seclusion could keep it that way. I feel like the multiplayer mode should be set up so you can create and customize your own server with an optional password, island and difficulty settings, and max # of people.