I'll just say I'm more focused right now on the overall layout and style of apps than the entire, section by section detailing of each kcm, unless that's the intent. As such, my mock up of System Settings will have lots of empty kcm sections. I do, however, make or try to make as much of a diversified layout for each environment (full sized desktop, small desktop/tablet, phone/mobile).
{F8669119}
{F8669117}
{F8669116}
{F8669114}
{F8669115}
{F8669118}
All in order of display size and content navigation.