It sounds confusing. He had a rating system when you came up with your system. But he renamed it to PAAC so he might have stolen it. A few million needs come up with rating systems. He at least compares it against the current year average. So a PAAc rating of 2 the previous would actually be a -4 if the entire league on average got better. This stat is more than just TS%.
He had his Locke Offensive Rating, which was not renamed to PAAC. It was different. I'm not trying to pretend to be a genius by the way, PAAC is very basic stuff. I was just the one who happened to mention it to him.
It's so simplistic and narrow focused it really shouldn't be called a rating system. The way he throws it around is major disservice to the actual analytic models that have been built. Nothing is wrong with the number itself, but Locke is a text book example of someone who does poor analysis and uses things incorrectly.