You said"I bet most college coaches believe your ranking. If not, they re missing out. The only time I ve seen it not predict well, is when one player has been hiding ( sandbagging), coming back from injury, or there is a psychological factor between the players."
The system is still getting rigged. There are a couple of 2013 players who decided to repeat or prolong or redo their sophomore/junior year and now jumped up in rankings and stars/chips. Almost like an artificial "gap" year.