I don't really like flat maps. While it may be good for path finding, and really easy to make, it just is too bland.
I prefer maps that make players think a bit, so each side would have multiple offensive/defensive rally points.
(Yeah, easier said than done.

)
To be fair, the map would have to be symmetric for the most part, unless you are into map themes, where one player (perhaps the weakest player) picks the 'best' spot, and then the others pick 'harder' spots.
Or have maps like king of the hill type... or.. or...
Too bad the editor isn't that easy to use, and you have to read that tutorial 100 times, and then, make lots of practice maps before you understand all positions (if not symmetric).