What airtime hill are you talking about? If you're talking about the turnaround hill where the corkscrew is now, then yeah, they had to lower it to make sure it made it through the element at the right speed. This should also help with the pacing for the final half, since it seemed like that hill on the turn around killed a lot of the ride's momentum due to it being so weirdly high. If you're talking about the one after the turn just before you go back into the tunnel, then yes, I think they're actually going to be making it the 110 degree overbank turn with the way the structure looks.
Because this was Gravity Group's first project since they formed the company after CCI closed, I can see a few flaws with the design and replacing probably the biggest with the corkscrew should help a lot out on the 2nd half.
Also reading back on the Facebook page on the original announcement, quite hilarious reading some of the GP comments on it.
Ahhh yes! I was talking about the second one. I really didn't notice that it was being made into an overbank turn.