More good ideas! Cool! So when will they be implemented? lol
Adding onto the idea of some kind of worship rituals around the idol (other than honouring the idol), why not have some rituals or activities around the restored temple as well? It can be started by the GC! Once it is restored, the villagers don't do anything there anymore, which is kind of wasting the graphics if you ask me!
Same for the cave - why not let some doctors study it and builders excavate it somemore? After some time, let them bring out some artefacts that may bring good or bad fortune to the villagers! And the doctors with more answers about the history of the ex-habitants of the island.
Adding onto the idea of a school - why not have it when a particular Master wish to conduct teaching, all kids and/or trainees will gather around him/her in the centre of the village or somewhere? And if he is a Master, the students will all have added skills after the teaching - may be a few % will do.

Btw, do the women still only breed with one male while men breed with many women in v1.1? I think this may not be as true in tribal cultures.

I wish there is more to do once we solved all 12 puzzles and obtained max village population and gathered more than a few hundred years of food. Something to keep the villagers busy - say art and pottery?