This really a post for New Forrest.
I don't think it helpful to take KPs account of her experience at her first Rashid clinic with her own horse , and apply it out of context, or regard it as the whole story. Rashid teaches in a school and most often on a 20 m circle close to his spectators. He produces suggestions which he believes might help a particular pair, rider and horse. And he moves step by step in a progression that is likely to give a desired result .
Mark told me that what I had watched was one of his most advanced riders. No one told me that at the time. But when I went home and told my RI and she told me to try it, I replicated the steps I had seen him teach. After the lesson horse transitioned on a thought , my RI told me that some students found easy even if like me they were novice riders and some of her advanced riders didn't get at all.
I find it hard to remember where you are in training your cob, but I have watched Mark help people back horses and also Michael Peace. In both cases clarity is everything and one can see the cues. Similarly out hacking , I expect any horse I hack to go forward easily on minimal cues because I am a lazy old woman. I use Mark's method described in the other thread to get the walk I want but I don't ride out on the open blithely trusting my horse will be guided only by my thoughts.
The language of what one wants is conveyed to the horse through ones seat. By the time I first heard Mark I had had hours of lunge lessons teaching me how to sit and feel the horse. I had ridden bareback . And I was taught all this for the sake of my own safety. Not for the sake of the horse. Mark teaches a rider first to breathe and sit relaxed so the horse can move freely forward. The next step is to understand and count the beat of each gait including halt. Once he has shown a student how to do that, he will suggest that they may find they can change gait just by thinking a change in the rhythm.
My experience of RS horses is that after a few hacks, they pick up the characteristic changes in our position as we prepare to transition and offer what we are looking for almost without our needing to teach them. The downside is that Maisie sometimes took off when I hadnt asked. Horses equally may transition down. But I would rather a horse read my thoughts wrong than it didn't read them at all.
I hope this is helpful .