i doubt that after spending all that money they would be tearing it down? Im sure they would have researched the steel beforehand to get the most appropriate. Unless this is confirmed someone is just pulling soemones leg.
I am in the construction business, to be precise I am a concrete batching facility engineer. The last time I saw when supporting rebar was removed was when the temporary wooden forms that made up the form wall caught fire from a welding incident. Rebar is NOT high tensile, its actually very bendable but it MUST be clean of corrosion or heavy rust. For a state project or critical applications its coated with heavy paint almost like plastic.
However with the park having been through more than its share of high winds I would not be surprised to hear of reports of structural integrity being compromised because not all of the outer shellwork is finished, or maybe a revision of design or addition of a certain guest safety issue is being resolved?
As big as it is it could have shown a nasty problem or two from wind harmonics, anybody remember the old Tacoma Narrows Bridge?
Its not uncommon to have different contractors doing different aspects of a project, stages of areas such as foundations, rebar placement and such are not done by the same people that do fiberglas work. When the next phas was being started (overlay) it may have been noticed that the specs were out of range of where everything supposed to be. I see that a lot in my business (concrete).
This may still yet be just a rumor started on one discussion board and is bouncing around like a rat in a bucket, I see it here and elsewhere but thats the way rumors start.
Actually its the no news about things like this that gets my curiosity, this needs some real up front observers to confirm whats going on.