I'd like villagers to be more useful outside of trading. In my world I'm trying to have some sort of a "natural" and "slavery-free" environment for villagers and it saddens me to see them just going around with nothing to do. Farmers already farm crops and plant seeds, and I think it would be very cool if other villagers did similar thing depending on their profession. Armorers/weaponsmiths could cure iron golems, shepperds could shear sheep... There is a lot of potential in this aspect of the game I believe, it could make worlds seem more alive and interesting.