For people who don't know what is the active freewheeling here is a video where a castle ice2 160hv (without AFW) is compared whith a kontronik kosmik 200 (with AFW). Not same size or same current but it gives an idea of the efficiency gain that the AFW can bring to the table at partial throttle (see delta T values for both ESC after the tests).
https://www.youtube.com/watch?v=AKN18ZTqoag