Been a while, but as I've been tinkering around with maps a little bit lately, I found that there are a few things here and there which might be very well worth adding.
For instance, the grass tileset is the most complete and can create the most beautiful maps, yet there is a tile that could certainly make it for a truly complete set and allow for much more variety (I know time is pressing, but methinks it would be worthwhile, as the grass set can really give the most interesting combinations now):
(http://s1.postimage.org/F37lr.jpg) (http://www.postimage.org/image.php?v=gxF37lr)
The one on the left is the major one, but having the one on the right, but with grass spots on diagonally opposite corners of the tile would really be the icing on the cake and make the grass-sand transition the most complete in the map editor.
A 'house' tile which has darker wood on three of its sides.