I really do think people are sleeping on how many problems the moving walkway is going to give guests. An outside force that moves people's legs, particularly one that changes the legs' position in relation to each other, will be very destabilizing, especially if the guests aren't used to it and are distracted. If I had to wager, I'd put some money on the claim that trying to figure out how to handle that issue is a big part of the prolonged adjustment process that pushed back the opening.
And it's not a ride.