I'd like to see more island events inspired by what the villagers see and do.
For example, while training your doctor for the umpteeth time on herbs, s/he sees a _bug_ trapped in a web on one or wonders about the leaves or something and up pops an island event saying:
Doctor finds a _bug_ trapped in web, let it go or not?
Let it go: bites and kills doctors. Not: Spider eats _bug_ and the Doctor find out it's Charlotte and wins the next spelling bee.
Doctor wonders if the leaves will have medicinal purposes:
Doctor eat leaves, has an experience and viola, an intiation/totem animal to adulthood ritul starts and culture points are increased.
The doctor decides it's too dangerous and is never known as the next Louie Pasteur while his/her upstart apprentice eats the leaves becoming the island's most sucessful doctor and firing the wimpy doctor.
There's heaps of island events that could happen AS the village actually do things (like a coconut dropping on the farmer's head) Or they DO actually find a bag on the beach and then up pops an event.
Or maybe there could be moral choices too.
Do you decide to parent with the woman that just gave your brother children or not?
There are heaps of implications here.
Disease or duelling to name a couple.
Kayluv, I love all your above ideas. One thing with the collectibles though, it would be cool if they gain tech on the double ups

Also, I'd like to see more tech points for the more rare collectibles.
For example uncommon gives 150 while a rare gives 200.
I'd also like more ways of customing your game rather than having the difficulty levels.
For instance, you can choose (to a point) how many villagers you start out with, 5,6,7,8,9 or even 10.
And you could choose what gender and what your intial villagers looked like if you wanted.
You could choose if you want a high number of resources or a low number.
If you wanted a lot of island events or a few.
You could more time speeds available, say 5x and 10x and 20x.
It would make the game playing a lot more individual and would result in quite different games. It would also mean you could find a style more suited to you.
Now that would be cool.