I think they should add a type of currency where you could buy items if a ship comes past which could also be added in the game.
I also think that you should add workers to the game, so with the currency you could buy a fisher which fishes for you or a farmer who harvests and plants seeds for you or even a water or food worker which automatically sorts out your water purifier and food cooker. On the home screen when you select your raft it would show your raft instead of the standard one.
Please make these choices possible!