the grass needs less definition, it looks like there is a noise filter on it now. You need something like hair/lengths for strands of grass (the scale of the world map makes no sense).
as to the color, add some yellow to it, to make a lighter color, cuz as stated, its too green.
i originally had a grass texture that had what your talking about, but the game randomly flips around the textures on the world map. This produces some very nasty "seams" in textures that are vaery visable, and the only way i could get rid of it was to add some noise to make it less noticable. look at the stock world map, it's basically a bunch of big blocks that resemble terrain
I see why square went with that type now, because the non-tiling nature of the world map requires noise, otherwise it looks like a bunch of puzzle pieces.
Also, more details will be added to the grass (color changes and additions) but they all have to be able to tile correctly(an un-noticably) within the game. I created seamless textures at first, but they looked awful because the game doesn't follow the texture applications standards that we are used to in 2009.
Also, showing the new textures next to the old makes mine look much more defined that they really are. Once i have everything completed the new textures won't stick out licke a sore thumb(as they do now)
lee