As for now late game is about: Survival, Expansion on the Island, and getting new stuff by Expeditions.
The Survival and Expansion part on the Island is already quit good (of course there is always room for improvements and balancing), but i see much more potential for the Expedition part with the ship.
E.g. You need to get sheep to get wool for warm cloths -> Awesome! I get as reward a new better Equipment. I think we need more stuff like this
As for now i don't see any reason to get cabbage, or cows etc. Sure they make milk, but what to do with milk? There should be some diary production building for cheese or yoghurt which should be better than just growing potatoes etc. This is just an example, but for the late game we need more stuff following this structure: Bring something new from the expedition, grow it, manufacture it, yield better food or better equipment improving the village productivity or happiness. Also new buildings or professions could be added in this way
@ Community: If you come up with any lore friendly (medieval ) nice production chains or new equipment, buildings etc. pls post them. I personally think it's quit the challange to think of something. Cheers !