maybe its getting the 3d treatment
I've not been to see the 3D version but rumor is the functional difference is that the loading belt moves slower to allow the time to distribute the glasses and such.
If that's true or not, I dunno. But what would need to be done to make that change in IOA is another unknown to me. Maybe it's not true at all.
In the big picture the vehicles are always moving at the same speed and the arm is whipping you around so you don't notice. But I know the vehicles can exit/reenter the lineup and they can have their spacing adjusted while they're moving to alllow that to happen. Little bumps to slow a particular vehicle (and the ines behind it) down until you grow a big enough hole to stick a vehicle into.
So going slow temporarily without anything else changing seems like an option.
But who knows if that's something they actually will need to do.