Towns is another feature that could be greatly expanded.
Have the economy change the shape of a town. Have it so that you see other people having to buy things. People have jobs and money, etc; and all their dynamic choices affect the shape of their town. Might even have new people move into the town. Maybe even new businesses, or something.
That's my long term target with the Forum RPG. Make it a "bite-sized" world.
Basically make it so cities have ~50 citizens instead of thousands and then scale everything up to compensate. All the crazy complex interactions of a real economy and society, but with only a fraction of the active agents involved.