I really like it. I'm a bit surprised, because I don't usually like yellow and I am a very color oriented person, but I think that it looks like it was designed with a "modern" feel on purpose. Something about the way the colors appear to me, the yellows seem to draw the eye both vertically and horizontally and the other fabrics add a lot of interest. I agree with most everyone else, don't change it, add some black as a border. I'm not sure how piano keys or more squares would alter the feel of it, but I'll be ambitious on your behalf and say prarie points of colorful scraps!