I would love to see farming added, with watering, and tending your fields.
I played Roma Victor and they had minor tending of fields in that game, and people thought it was fun. Also knowing when its the right time to plant, and cut your corps for best QL and max yield.
They also had a system you could fertilize the fields to help QL go up. I would love to see these types of effects.
Maybe also things like mutant crops where you can use farming skill or alchemy type skill to come up with a new type of crop that will have better effects. Health bonuses, or stronger cloths etc.