This is my first post here, and I can't read all 20 pages right now, so I hope I am not repeating myself but...

My idea is the ability for villagers to build a hut, then you could choose from a list of available stores, shops, or whatever for the hut to become. The different choice could have an impact on how/what order your game plays out. I do see that people have suggested many types of buildings already.

Another suggestion (and maybe there is a way that I am missing?) but make it so you can tell just how long a mother has left to nurse before her child is free to run around. Maybe a progress bar.

larger village, or the ability to travel between both sides of the island.

let the kids go swimming!

on the tombstones, give the reason for death (old age, starvation etc) so we know what we are doing wrong!

"sleep mode" so when you go to bed at night your villagers can still work, just at a slow pace so you run less risk of waking up to the plague or something.

recreation such as an area around the campfire where the village members might gather and sing songs and that sort of thing, perhaps a position of village "shaman" or "story teller" to go with this idea.

I hope my ideas aren;t lame and/or repeats!