Definitely had holes..
But notice the lowest tier "doesn't."
And using the giant version of the pic from earlier in the thread, it's like a slit.
Weird, no?
Also, they cut out part of the side wall. I think they discovered the up-jet didn't work and those cutouts will allow for a side jet - you see them on the blue wave/wall slide as well. That'd be like a big jet spray onto you as you come out of the tunnel and maybe even splashing on the circular bit. Then I assume the holes became drains and are just obscured because they're much smaller now.