Well I don't think they should have hens and chickens and things because its a TROPICAL island
Chickens originated in India. That's tropical enough for me.
If they add hunting, it would be a great way of adding livestock. I'd like to see farming give you a mini garden where you can select what you want to grow, which in turn adds to the cooking aspect of the game.
I'd like to see the VV series become more of an ecology sim where the goal is to achieve a balanced, healthy village. I'd like to see mini games related to common activities that add more playability to the game. Gaining tech should open up new kinds of game play, not just a quick two minute cheer. I'd like:
1) a garden sim where we have to select what produce to grow and protect it from animals and bugs(A fishing mini game might also be a good idea). Maintaining a balanced diet should be importaint to keeping villagers healthy and make doctors more useful.
2) Sewing could easily be a crafting mini game where you have to generate new patterns/colors for outfits and sew them together. I can also see adding a mini game for changing hair styles, creating pottery, or making tools for the villagers.
3) If livestock is introduced I could see a minigame with the children herding livestock. Children are so active, they really need more than just foraging.
Additionally, it would be interesting to have each save in the game act as a separate "village" and allow villagers from one "village" to visit or live at another.