Administering these call-in rules issues is ugly, looks bad, and never helps a telecast. That's why this announcement was made.
When someone calls in a violation next year, the organizing body of that even will be able to say they have it internally. No sweat. The goal is, and has always been, to get it right. This announcement doesn't reduce that goal, or chances of attaining it.
Erik, I think you're overstating the notion that a player may not disclose a potential situation, under this new guideline, simply because the risk of viewer call-in is lower/eliminated. There are players that go to, or beyond, the edge now and there will be in the future. Their reputation goes with them. The ultimate onus is on that player and his marker to get it right.
The best case scenario would be to find an incentive for the players to protect the field...but in the chummy club that the Tour has become, not even the rules officials have the incentive to protect the field.