This sounds very interesting as it would mean more exploration of the world. In most of my games I only explore a tiny portion of the map by the time I kill the 5th boss. It would even be more masochistic if someone developed a mod that reduced the potential spawning points of bosses and the merchant down to 1. That would require a ton of sailing but then again sailing and chilling out on the boat is one of my favorite things to do in the game.