Previously if you kicked it short of the goalline, the ball is spotted where the ball carrier is tackled. Now, that ball carrier and waiver fair catch at the 2 and it's automatically spotted at the 25.
When the ball hits short of the goal line, you are taking a risk by just letting it bounce. There's no guarantee it's going through the endzone. As the kick returner, the smart play now is to fair catch everything inside the 15