I think that a few things Wet n Wild need, are thus:
1. A new design of pathway, when I was walking towards Aqualoop, my feet were so hot, and there was no where to cool your feet off, and they were literally burning. I believe that a away to stop this, is by building some little pools here and there, as when paths go around there, if you dont have shoes, you can easily walk in the pool.
2. They don't massively need a new waterslide, but I believe they will be due, and there are a few styles of slides they are missing. For example, they are missing a ride such as the rip, and while it may seem similar, they could also incorporate a wave turn like the one below.
This is Bombora at Wet n Wile Sydeny. The Sydeny wate park, has a lot more mordern slides than the Gold Coast one, and Wet n Wild defiently needs something like this. But it may just look like a bigger Kamikaze, so that is why you incorporate a BehemothBOWL, such as the rip, but more like this at one of Six Flags water parks.
I could see Wet n Wilds having a longer trip, before entering the bowl. This would keep the water slide original, not just in Australia but also in the world. I believe the one at Six Flags is one of the only in the world. But this does look like a very expensive style of ride, and if VRTP were going to spend so much on their water park, it may be worth while spending on a tower of a few slides that are cheaper than the above. I'm thinking something like this.
This has some smaller BehemothBOWLs in it and also a few normal slides like Constrictor, that I could see gaining a unique element.
Some have raised the point that Wet n Wild, need more body slides, and I don't believe they do. You've got the Aqualoop tower, the Jet Stream tower, and the river rapids, which is a fair few body slides. I'd like to see a unique big ride that has a high capacity such as the four-seaters, to chew up some of the lines which reach up to over an hour.
As to where the rides could go, I see some space where a volley ball court is near Kamikaze. I'm not quite sure what is in this space, other than a field and the court, and I'm also not sure what the volley ball court gains for Wet n Wild. If any one knows please share. I've always felt that the area was a little empty and could do with a ride. There is also a bit of a creek that seperates the Extreme H2O zone from the rest of the park, and I can see a ride that goes over the creek, which would be pretty cool, and it would make the seperation of the park more aesthetically pleasing. Ther is also space up the very back where a few tables are covered. I understand that these can be rented out, but there is a lot of space there that could be used. See the map below:
The red spot is the area over the creek.
The reen spot is where the volley ball courts are.
The yellow spot is where a few tables are.
These are just a few ideas as for what Wet n Wild could do to mordenize their park. If Wet nt Wild, were to spend big on new rides, I'd also like to see them introduce a system I saw in the trailer for the new Volcan Bay water park in Orlando. They give out bracelets at the door, and you use these to save your self a space in the qeue, and then when your time comes, you jut walk up and ride.