I like the concept... please do it a bit more refined and more colorful so the client can see that ... try a lighter blue or grey background with teal, red, yellow ... it has potential but this really is rough.
keep the rougher look of #7 but make the lines a bit thicker and use colorful cross bars maybe oranges and bright green and blue. (client feedback) you might add a texture to the lines? or variation using the line width tool?