Here's something I would like to see added to the editor: I think it would be useful to have an option to randomise the terrain of a map but without changing the coast lines. In other words, if I want a map with say two large islands with a narrow straight between them at one point, I could draw that using just grassland squares then click a button and have the editor turn the grassland into forest, jungles, hills, mountains etc as it's rather tedious to do it yourself (and it never quite looks right when I do it). It should also have the option to place resources randomly (either all of them or just the one's you select) and maybe randomly throw in a few rivers too. I think this would greatly speed up drawing new maps.