I added celery, carrots, and clams, and replaced the water with chicken broth and the milk with half-and-half. Maybe some bacon grease was added for flavor since butter wasn't included, but who knows for sure. I think I'd omit the corn since it made it more of a corn chowder feel than seafood chowder, but good none-the-less. Cook the bacon while you're chopping the veggies and the prep time is close to 15 minutes.
This was a pretty good low cal soup. I used 1 can of creamed corn for the corn and also 1 can vegetable broth for the soup (in the dirctions but not in the ingredients) - although this kept the calorie count fairly low, a more substancial kind of soup may have been a better choice.