Good observation, I didn't catch that. Though I still have a hard time believing that the i-beams are temporary and just for testing. Maybe those supports will get some themingood placed over them. Special lighting effects that wouldn't work with a round support? Just speculating as the this point.
I don't buy that either. I would say maybe the building may be getting extended to that part of the ride for lockers or whatever but there's now I beams being used at the footers in the water so I'm really not sure what to make of it.