- Undo/Redo functionality (Oops, forgot to implement this from the beginning!)
- Ability to change the color gradients used for coloring the map.
- Ability to define custom grids, in addition to the zone grid.
- Ability to draw/annotate anything over the map (on a separate "layer" of course), for example to signify key locations. This can be used to create "maps" of the maps, if you will. For example, in a big game you might wanna have a map the player can open and look at.
- Ruler and other UI improvements for measuring distance.
- River generation system, perhaps by drawing a bezier curve.