Admittedly it seems the new improvements took some of the tedium out of terraforming what seems to be the entire map. However, in my latest playthrough, I noticed that most of my worker's efforts seem to be taking up with moving back and forth between work spots, rather than doing actual work.
Workers will go to a spot, dig a single shovelful, and then move on to the next spot. This makes the terraforming quite inefficient and a real drain on your man power.
Again, I think the map generation needs a major overhaul. So that terraforming is something you do to tweak the landscape to fit your town, not completely rework every square inch of soil.