This complete transparency is new ground for the NSTB; right? Well, maybe this is not a good thing....
They should not spear anyone especially the crew immediately. They should wait until all the facts are in.
The NSTB is simply feeding the Internet frenzy for speculation on how and why this happened. Accidents are not cut and dry. The are caused by many factors.
I don't think suing the NTSB will go far in the USA.