@Boris_Kotov I was just formulating this idea tonight. I see I’m not the first one to think of it. Nice drawing. 
Maybe it would be nice I think it would be good to include a built-in USB-PD port for power input on the opposite side from the cable. Since a common use case would be to have this device serve as a docking station. I think the positioning would be nicer, and it would conserve the other slots.
