I don't know about anyone else, but when I map something I try to make it seem as natural as possible and try to eliminate the grid feeling. Since the map maker works in layers, would it not be possible to make it so that the snap to grid style of mapping that DM currently uses would be able to be toggled so that you could place a turf anywhere on screen? What I mean is, could the mapping portion of Dream Maker have its grid togglable to make mapping a natural looking enviroment more easy? I think it would be a great improvement and cut loose some of the restrictions of mapping.
Also, what if DM would let you manipulate the size of turfs so that you would not have to blow them up or shrink them down in a painting program everytime you wanted something to be a bit smaller or larger? Just a few ideas I feel would make mapping a bit easier. :)