This is so genuinely useful feature. Unfortunately, I think almost nobody will use it the way it was intended. Besides me, I doubt many players will have dozens of configurations saved. Most will either never use it, or they'll end up with exactly one saved setup: Mainland, Circle Placement, Temperate, 4v4, Low Res, 200 Max Pop.
What's even more telling is that Feldmap was given a special feature for a specific group of players so they can Shuffle Positions, yet it is never used.
(And is not because is a bad feature, but because of user error.)
I think I finally understand why some developers become defensive when some of us suggest improvements. A lot of users are like customers of certain tech brands: they just complain that things are bad, but never take the time to learn how to use the tools, features and options already available to them.
0 A.D. offers an incredible amount of variety: different maps, biomes, placements, civilizations, victory conditions, strategies, and historical settings. There is a huge amount of work and detail behind it.
So I want to take this opportunity to thank the developers for creating such a great game with so many possibilities.
My impression is that most players have no idea how much content and variety they actually have at their fingertips.