The ride wasn't unsafe for riders when it allowed guests - but the derail did happen. Not "fly off the tracks into a wall!" derail, but a car did become partially unhinged from the track. There were other major issues, too, that weren't reported... Those were sorted out.
The computer/software issues weren't. Bottom line is OI turned out to be right, whether or not anyone here wants to admit it (or try and change the narrative or whatever). The ride's an operational mess. It'll get there - eventually. But this isn't "good" by any stretch of the imagination.
That said, when it works, I've heard only wonderful things about the ride, and I can't wait to experience it.