I think it's best to get what everyone wants in the new map format down somewhere, so jits can get new ideas/ to our every whim.
Personally, one of the things I would like to see is for some level of 'coding' that the mapper can do. Like "If the (team) flag is grabbed", "A new path opens up". "If (team color) player is standing at (trigger), "A door opens".
Something like the starcraft trigger editor might work, but I was hoping for something more powerful. Code or web?
EDIT:
Oops, forgot about this.
When I made the tile wood texture with the Wood Generator or whatever, I used the colored planks. When repeated, this made it very obviously repeated (or whatever). So, would it be possible to have a "random" secondary texture that would tint/be opaque over the previous texture?
For example, there could be noncolored tiles. Then a secondary texture that would have random colors between two defined colors over the other, with about 85% transparency. I don't know how the different random areas would be defined, but it's just a thought.