I agree whole-heartedly that styles must adapt and change over time, and that kata may be reviewed and changed as well. My instructor (an 8th degree and one of the Chief Instructors of the style) has recently had us make a change to the way we perform a specific technique in Naihanchi Shodan and another technique in Seienchin because he determined that the original techniques of the kata were not able to be practically applied in the same way that they were performed. Likewise, we continue to include new methods of moving, defending, and disarming in our training as we learn new methods. If a style remains exactly the same since its creation, it will stagnate and it's inflexibility will most certainly be its downfall, in my opinion. Very good post, sir!