Villagers should have evolving villages

Villagers work from early morning until night, but their villages never improve.
I think villages should evolve over time.

Houses: Villager houses should upgrade as the village grows. More villagers means bigger or multi-room houses.

AI / Intelligence: Villagers should be smarter. They should protect themselves better, go inside at night, and react to danger.

Farms: Farms should expand with the village, with larger crop fields and bigger animal barns.

This would make villages feel more alive, fair, and realistic.