No idea how big it will be. If 1.9 fixes iron farming, it will be about twice it's current size. However, that growth will extend to the west. If you look close enough, you can see the road tunneled through the mountain just to the west. Like I said, if iron farming comes back, I will build about 18 towers out there. If not, not sure if it'll ever get revisited.
Oh, and if copy/paste ever comes back, I want to move Monument Tower from downtown to Tall Town.