Has it still been testing? I just thought things quieted down after it was seen doing water dummy test. I could be way off base, but if testing did slow after that (around the time folks started saying it was the one attraction farthest behind schedule). I was just thinking maybe testing did not go so well.
To me, the good news would be they seem to have a solution if folks seem to know the time frame for turnover. As you say, a rollercoaster should be straightforward which could mean training/getting up to speed should be pretty doable whenever that get over whatever hurdle they currently face.