I think it would be a nice way to expand the experience.
I like Pelican town, but once you reach a certain point, I can see where it may seem that you have been everywhere a few times over. And honestly, I would purchase expansion packs in a heart beat.
They could add new places, new people, new items to farm, equipment, and even possible more land you could purchase to expand your fields. My sister and I would have a blast for sure... having played the initial years a few times over at this point.