I have this posted somewhere else but it fits better here
"I think it would be nice to make it more adventure like. More levels of technology with less points needed. Maybe even some minigames. It would be nice to make it so there is more you can do. I hate that it ended so soon. I finished in less than 200 hours and I think it would be more fun if there was more to it.
With the upgrades maybe you could pick individual things with different levels like Cooking for better use of food (villagers require less food) and disease, maybe different types of sick..., building levels that allow you to build boats to explore other islands, understanding of the island to use the plants for medicine and predicting the weather for better crops and less casualties during trips to other islands. Stuff like that. "