I wouldn't worry about it. The NTSB has been desperately trying to force the FAA to address pilot rest requirements for the past decade. The NTSB has no regulatory authority, just a bunch of highly educated people who know exactly what they're talking about.

Which pretty much means NADA when talking about the FAA and the numerous industry groups that oppose expensive changes in rest requirements for pilots.

That said, it looks like the CA had 22 hours off before showing up for his shift. That's plenty of time for rest. You can't regulate poor judgment (like riding a red-eye during your rest period).