There is way too much attention being paid to coaches in general. Somehow when it comes to Justin Rose's nearly-flawless swing Sean Foley is a great coach, but when Tiger is concerned his teaching philosophy is trash. The reality of the situation is that Foley is working with what Tiger can physically bring to the table right now. Tiger's body is basically. He's constantly playing at 50-80% health and the PGA is way too good these days for anyone to win that way.
Over the years trying to compensate for numerous knee issues eventually led to his achilles. Trying to maintain his length while compensating for his deteriorating knees and the achilles has led to his back issues. This is not rocket science. His range of motion is lacking, his back is f-ed, and his confidence isn't anywhere near what it once was. The only thing I agree with Chamblee on is how Tiger's timing has to be perfect on every swing because he doesn't know what to expect from his body.
Butch's teaching didn't cause the first knee issue, Haney didn't cause the second knee issue or the achillies, and Tiger's back isn't because of Foley. Unless Tiger makes the sacrifice of time to rest and to get truly we might as well get used to seeing this.