I've been using this technique (but honestly, haven't done as many as you have and might find what you describe to be more practical) of completely relaxing and leaning forward downhills, matching my body angle to the slope, and moving my legs much quicker just to keep up with the "fall"...it is slightly scary at first, until I trust myself, and any kind of breaking doesn't feel comfortable in any part of my body using this method--so I have to really commit, no hesitation, until I'm down. I have found though, that because of the "fall" even when I step "unfortunately" my body weight never has a chance to fully commit to the foot, because I can move it/adjust it with the forward momentum, to avoid injury. My arm form looks like sh!t when I do this, they are waving all about managing balance, but it's hella fun!