Hmmm Rory stiffs the DP World Tour but then gets exemption so he can still play the Ryder Cup. Playing the PGAT full time and living in Florida. I wouldn't take anything this guys says with a whole lot of confidence.
One of the reasons to roll back the ball is to allow some of these old great courses to get back in to the game for US Opens. A lot of them are land locked and can not expand the course. A rolled back ball allows a 6900 yard course to be competitive without resorting to tricking up the course...