I usually use it for elevating my homes so that there are levels of stairs approaching the front door. Otherwise, I agree that it's difficult to find a use for the tool. The most I've ever done with the terrain was made a lighthouse on a large hill with cascades of stairs leading to the coast. That actually looked quite nice, but I needed a HUGE lot, otherwise it would have looked awful. I hope the next world we get in TS4 has lots that already have terrain editing or at least has some areas where terrain editing would blend in.
