I would like an isometric map element available for the dmf editor. It would simply be a 2:1 ratio diamond, rather than a square, and would act the same in isometric maps as the current square map element behaves in topdown and tiled maps. It would, however not display the extra icons needed to fill the square, if it's being used as the default.
As far as I can surmise, there is no way to create a resizable minimap, as screen objects do not stretch, and transparency for window elements is limited at best.
For the users, implementation would involve simply clicking a box under the Options tab for map elements:  Isometric Map
For you guys, I suppose you would have to get creative. I'm assuming the squared map is pretty set in stone.