What could be handy for the SD (scenario designer), would be to create a couple of basic huge maps for each ToO (a total of 14-16 huge maps for the whole project). Then any SD (scenario designer) may use any of these maps or a fraction of them and he could even (heavy) editing these maps in order to match the special needs of each scenario.
I think that by making something like the above (tool) we could provide support/help for the Scenario Designers that don't wish to spent time in the map creation/designing.
Of course, anyone who likes creating maps is free to make his own maps!
The map creation is a question of time, energy and creativity. If any of the 3 elements is temporary missing from the designer then it could be better to use a pre-made custom map.
cheers,