"According to your definition, the ultimate blending would be monochrome. "
I wasn't going to get involved with this one, but I can't let a ridiculous statement like this go unchallenged.
Ed's definition does not logically translate into monochrome levels, it's a bit insulting to suggest this.
His only point is that he prefers levels with harmony. It's called a preference and he's merely expressing it. He likes levels in which adjoining squares attempt to blend with each other to create a unified whole.
Your square does not do this. . . and more importantly, that's fine. Nobody is asking you to change a thing. You have the right to put the square there, people have the right to tag the level "meltdown".
But,you do realize this is Ed's sandbox you're playing in right? A little respect is due to the person who created the Gridcosm, and whatever enjoyment you recieve by coming here and contributing is thanks to him.