About natural riding, I've recently been introduced to a new approach by a fellow rider who's insanely controlled on tough terrain. Up until now, all the natural I did were usually "semi-urban" moves if that makes sense - jumping from one rock onto another, preferably moves which require a fair understanding of terrain, precision but mostly strength. This was fun, but after a while got boring.
What he showed me seemed pretty uninteresting - he pointed me to some tiny rocks which were barely sticking out from the ground and set a section. I was hooked for the whole day trying to negotiate the course which consisted of small rocks all of which had an area smaller and narrower than a shoe. At first it seemed very easy and safe but required absolute precision and control - no correction hops because there just wasn't any room. After a few days of riding sections with this guy I could feel my bike control shoot up dramatically. The rocks I used to ride before all seemed piss easy and even more boring than they did before. So based on that my advice would be not to ride natural like it's just oddly shaped walls but look for something that challenges your precision and control.