First off, let me start by saying that I havent had access to the internet for a while, so I havent had the chance to post, sorry about the delay.
Second as far as the evolution of martial arts goes, I think things will always change. I dont feel that any instructor teaches the exact same as anyone else including their instructor. This is mainly due to the fact that we are all different and have different perceptions of how techniques are performed and/or executed. We all bring a different aspect of the art we study, and I think that is the way it should be, we should all bring a bit of ourselves into the heritage of the art we practise. As long as the history, origins, and respect for the founders stay in tact, I dont feel there should be anything wrong with arts evolving. After all, a major reason we have some of the arts we have now is from evolution.
Would love to hear some opinions on this subject