I found another map which, when generated in the editor at bigger sizes, goes totally out of whack: "Archipelago".
Much like many other maps ("Hellas" for instance), the bigger the map gets, the less water it contains, at "Giant" there are just a couple puddles left.
Here is a screenshot of an "Archipelago" map, generated at "Giant" size. Does that look like an archipelago to you?... As you see there isn't any point building a dock here. Not for those couple ponds...