I have two kite systems and two bars. One system is Core Sensor Bar: http://www.corekites.com/us/sensor-bar. Core has a clever above the bar clam cleat for depowering. The second system is my OR Freestyle bar which has a traditional pull-pull depower.
Core, Best, Gaastra, Liquid Force, Ozone and Blade have all now gone for above the bar cleats for their new bars. I for one would buy a new OR bar with an above the bar depower cleat.