Harvest-able crops or at least the ability to get meat from animals.

Crops:
I've seen on versions of UO stalks that look very primitive, even though I'm sure they are from newer UO they still look ghetto to all hell. Could add some small fields in the outskirts with cornstalks that spawn corn, grape vines that spawn grapes, and so on on the ground. Or the plant it self could be double clicked to retrieve the food, which would go with the harvesting skill.

Meat:
Bird breasts or whole birds from birds.
Ribs from bears, deer, wolves and snakes.

Chickens for chicken legs.

The ability to sell to NPC's or from personal vendors to add being a farmer in with the Role Playing here.

Also on second age there was a feature that is gone from UO.
When you cut up a body you can use a blade on the arms and legs to get jerky that is edible.
It was just a piece of bacon renamed.
The food carried the name of the dead player.

For example:
a jerky of St Bernard.

You could also use a blade on the torso and head, giving you intestine, heart, bone pieces, liver, skull and brain of the dead player.

It was fun to have the brain or heart of someone you didnt like.