Yes, the art has changed a lot from the 70s through the 80s and into the 90s, with the final heavy emphasis on tapi-tapi as opposed to the largo style and all the emphasis on empty-hand joint locks in the 80s. The art has evolved a great deal, and the Professor was actively doing this. I expect that the same will be true of the MARPPIO contingent--that they will be doing Modern Arnis as the Professor envisioned it in the early 70s, unless they have evolved it from there. I expect that it will be very different from what the MOTTs are doing. I respect this and I expect that much the same could be said of Mr. Hartman--the Professor sent him to Mr. Buot for Balintawak so that Mr. Hartman could continue to evolve from the Modern Arnis he has been taught. This is not a problem--the Professor studied and melded many styles, and he hadn't finished before his untimely death. I don't believe that anyone is put off by Mr. Worden's evolution of Modern Arnis. Please undersatnd--we simply don't know that much about him. I remember a comic (B.C.) that I read many years ago in which one character asked some innocuous question, to which the other character gave the answer then added, "Why do you ask?" The first character responded simply, "In order to find out." Speaking for myself, I am asking in order to find out.