The wing ball still goes with some frequency though it's not automatic. But the high rack makes the one in the side fairly consistent - I think that is the reason these guys are all playing a cut break from the rail. Normally a cut break is used when breaking from the box to simulate a side rail break when trying to make the wing ball.
This is not a new thing. The WPBA has used the high rack Allison and company were all playing the one in the side with the cut break from the side rail.