Now that we have weather, it brings up the possibility that rain may help crops and other plants to grow more quickly, in biomes that get more rain. And conversely, if you settle in the desert you garden could actually wither and die if you don't get rain, OR actually provide water yourself. Snow might ruin the crop. This might require some sense of seasons—plant in spring harvest in summer and autumn.
I suppose water physics could be required, but maybe not.
Weather should affect our health. Don't know if it does? If we go into a snowy biome we could freeze, or staying out in the rain could chill us. Whereas deserts could dehydrate us faster, or even cause sunstroke (like dizziness?).
Animals, I, and others, have already asked about getting eggs and milk from farm animals. I assume that's planned. However I'm disturbed that we don't get meat from any animal we kill. Seems like we should.
Also, animals should destroy gardens and compete with us for food. Some animals might be nighttime hunters, too. So, is we're out at night we may be more likely to be attacked by a tiger or something like that.
Not asking for anything right away—just possible things for the future.