1984 Mid South was also unique in that Bill Watts *wanted* his talent to read the WON because he felt it was a great way for them to learn the business. He didn't have a problem with people like Cornette or Ross talking to Dave, and in old WONs, you even see them thanked for information by name at times. By 1992, Watts had done a 180 on that, probably because Dave didn't love his product nearly as much as he did years earlier.
My theory on that is that it's something that probably has been revealed by now, or something that if Dave was asked about directly, he would be comfortable revealing now. I'll ask on Twitter.