Six Flags at its finest.
Six Flags is likely to blame for how long it took the ride to actually be built, but delays during testing/commissioning are FAR more likely to be something out of Six Flags' hands. We'll probably never actually know what has gone wrong, but I'd love to find out.
it’s probably rough if I had to guess
That hasn't stopped B&M from turning rides over to parks previously. This is almost certainly something new/different.