Well if it's a virtual line like they say then it should only allow one. You shouldn't be able to virtually wait in two lines at the same time.
Wait, hold up: how does this work?
If everyone is waiting for the Krakatau Aqua Coaster, as it will obviously be the to-go attraction, then the virtual "line" will notch up more and more, right? If there are no standby lines available, then nobody can do anything else but the lazy river and the wave pool. (and arcade, food, gifts, poop, etc.)
That is unless two factors:
1) if there is a TapuTapu wait of five minutes or less, a standby queue is created at a slide for that moment, or...
2) the TapuTapu virtual queue has a maximum wait time limit
Remember that Fastpass works by allowing people to do other things. While the intent is to shop and eat, people maximize their time by killing two birds with one stone: wait for one ride, while virtually waiting for the other. TapuTapu can only function properly if everything remained equal. But human beings do not function like that. So I'm kind of fascinated to see how they work around that.
(and yes the third factor is advanced ride reservations but yeah that's not happening here)
Difference is every slide seems to be enclosed which should make it easier for people who are afraid of heights.
The drop mechanism will instantly chase anyone who may have had their fears quelled by that. That thing scares the heck out of me.
On a couple other notes:
My take is that the restaurant will have two entrances, one from CB and one from the park much like Rainforest Cafe. VIP seating, however, will be the ones who are able to see the water show from the volcano. (and yeah I totally see a separate CB entrance)
Also, does anybody know the possible capacity of the waterpark? I hope it's at a limit such as 15k to 20k to keep things a bit at ease but who knows?