Tiger had the same dramas when launching the NG. OTP sunk to 55%. It wasn’t just 30 minutes late here and there, they dispatched flights 3/4/5 hours late every single day.
So is it the old Virgin machines like Tiger also took that are the issue? I don’t recall Virgin having such issues. Perhaps Virgin having engineers at the ready in every big port ensured the issues were fixed quickly and the schedule holds.