I'm glad this works for you, but it doesn't feel like it's necessary a model of general interest. Not a lot of people are going to find that the tea metaphor does much for them.
Furthermore, I'd contend that the Wabi method actually wouldn't automatically result in great stories. As I understand it, the principles of Wabi tea are all about balance without symmetry and neutrality without boredom. The goal is to provide a setting for the tea that is aesthetically pleasing, but without distracting from the tea itself, which is the central sensory experience. Imbalance is distracting, but symmetry is unnatural, and so on.
Stories, on the other hand, are driven by tension. Story is about balance shifting, things changing, things dying, and things being born. Story is bloody and violent and unsettling. Tea is soothing, gentle, and neutral. Take the format - mat, flowers, heat/cold, preparedness, rain, consideration, "goodness" - and fuck something up. Tear up the mat, burn the flowers, turn up the heat, make shit up as you go along, toss out the umbrella, tell a story that doesn't care about the reader, tell a story that isn't "good." Let there be tension, and story will follow.
That's my philosophy, anyway.