Well, that was exciting, congrats to SpaceX!
Halving the propellant load time and showing robustness of both engines (all 33 on booster started again) and hot staging (it worked again) was progress. It was especially nice to see the pink of a nitrogen plasma, and how it was concurrent with the Karman line at 100 km.
The flight attitude instability of both booster (oscillations) and ship (roll) may have contributed to their respective demise (likely propellant sloshing respective exposing unshielded surfaces).
Enough with the conspiracy theories already!
You yourself recognize that FAA mission, which they exercise when they launch mishap investigations, is precisely that of protecting the public.
https://www.faa.gov/space/compliance_enforcement_mishap
The occurrences that made FAA launch a mishap investigations should be:
Let the administration do their work.
[As an aside, it is really funny for outsiders to see how the US failure to separate the government from the administration makes such a mess that even the public asks for the government to be corrupted (take direct action in administrative issues). No wonder that you like to spend so much time in litigation!]