What I would REALLY like to see in the next game is some list of the dead beyond the 50 gravestones. I'm tired of just noticing that someone is gone, or that my population is down and not knowing WHO died. I think that this would be a perfect resolution to the builders running out of things to do...have the builders carve the names of the dead onto a wall somewhere, you would have to click on the wall to read it, and it would list the names of the dead and their ages. The builders could get tec points for carving, and only the builders could bury the dead (they are digging holes to bury the dead, yes?)
I would also really like more to do once the game is going, it seems that once the village is set up, the game is mostly over unless you are like me and just like continueing it once you've finnished all the puzzels. Like once the game has been running for 200 hours a new thing happens, and then every hundred hours another puzzle is available. Perhaps a new herb appears or another use for something already available is discovered.