Why so long to release the FDR
Until the CVR and FDR are synchronised, we will not know which altimeter (radar or baro) the crew was using for altitude callouts.
In the meantime, there's very little factual ground to base anything on. I did do a descent rate calculation from the CVR timestamps and callouts some time ago, but still don't know if that's baro or radar.
The NTSB would have released the CVR and FDR within a week or two; so, what's going on?