I see problems with Pelton's model if the top four players are international players. However, that's not a big issue overall. I doubt Pelton intends his article to be a definitive ranking, instead a data study to help influence somebody who scouts with his eyes and experience.
I agree, but this international draft class is pretty extraordinary...arguably the strongest of all time, especially if you include Wagner. It'll be crazy if no international players are drafted in the top-10.