These plains are not really plain are they?
A plain is a flattish area -
Image from:
http://www.santharia.com/pictures/quellion/narfost_plain.htm
Two features of a "plain" is long rolling hills, usually very low - looking more like a calm day on the ocean. Few to very little trees - usually located at the bottom of the shallow valleys or along river/stream beds and lots and lots of grass or low lying ground cover.
Hills are usually far and few between with wide near flat areas.
Nebraska is plain land it is a slight incline from the east to the west - over the whole length of the state. Here and there the occasional hill will rise up, but all in all its more like a table-top that inclines or declines to one side. (We drove through Nebraska a few years ago on the I-80 it is nothing but near flat and lots, and lots, and lots of corn
)
Your image above is of hills. Now if you lowered the hills in the foreground (close to the camera) to mere long humps, leaving the tower on the distant hill it would be more along the line of a plain.
I'm not being the spelling police in my next comment, the spelling "Plane" is more of like the air plane kind or a tool used to plane a material flat and smooth. Plain is used for land form and also for describing a thing as in "that chair is plain". We usually refer to land forms as plains as in The Great Plains.
I tell you this to make it easier for you to find images on the net for the land form kind of plain.....
other images of plains:
http://bejoscha.tavernmaker.de/bejoscha/land/plains/pages/plains-018.htm
http://www.gilgordon.com/escape/35nov00/image1.htm
And a web search of images of Plains
http://images.ask.com/pictures?qsrc=167&o=0&l=dir&q=plains
All and all on a scale of 1-10 I would rate the Plains of Peace at 8 or 8.5.
I think you could add a bit of variety in color with your rushes/grass by making a few customized ones and lowering the red and the blue part of the spectrum. Clumping together a few light green, dark green and brown grass/rushes will add a bit of depth and realism to them.
Why more green? Because you are using the moss covered Sunken Ruins rock - those have a very strong green color, something you would find in the spring or the summer not in the fall feeling brown rushes (as grass). Brown is indicative of low water in the region - thus moss would not exist to this great extent - lichen yes.
Either that or replace the moss covered rock with other rocks from another set or with Rock Chunks (destructibles) if you desire to use rock chunks in a map and do not want their H P bar and do not want them destructible, then you need to make customized ones and make them say "pathing blocker" (relatively easy to do).
