The cause of the chute not deploying appears to be clear cut but the actual initiation of the firing sequence may not be so clear cut and I am not sure that endless speculation will get to the bottom of it,I am sure that we all have our theories of possible causes.
It was such an unusual scenario - I don't think anything quite like this has ever happened before (of course I am aware of other accidental ejections but they were very different).
In this (tragic) particular case I am on the side of waiting for the official report,anybody who 'needs' to know will be kept in the loop.