Here's an idea: give the Villagers certain items and they can either defend, fight, craft, build, or attack you. The Villagers need a propose. They can't just be there.
Another item is adding natural disasters like tornadoes, tidal waves, earthquakes, etc. That would motivate you to build big, stronger houses. But for those people that don't want this mode, add an on/off switch.
Those are just some of my items. I have more and I will use those later.
-Ingus13
