eezeegeebee,
You seem to have conveniently left out a few details in presenting your case - important details. Such as the (independently confirmed) act of deliberately selecting 100ft on the MCP and commencing a descent.
What we have are a series of confirmed (to beyond reasonable doubt) events, for which there is only one plausible explanation - Which is why the conclusions already reached hold up, and have been made public. I appreciate this is slightly different to concrete proof, but air accident investigations quite frequently fall short of the 'concrete proof' standard and settle in the realms of 'no other plausible explanation' or 'most likely explanation'.
There persists a lot of unreasonable (IMHO) doubts being raised here.
Hypoxia has been ruled out (beyond reasonable doubt).
Incapacitation has been ruled out (beyond reasonable doubt).
Who was were and who took which actions have been established (beyond reasonable doubt).
...all from combinations of CVR and Mode-S ES data.
I don't believe the FDR will add much, if anything, to these conclusions.
As shocking / unbelievable / unpalatable these conclusions may be, they are supported by the evidence, with no other plausible or likely explanation. It's time to move the discussion on.