I'm genuinely curious as to why you think how he opened the door is so important.
Myself dunno if it's more or less important than all other movements .. actions and chatters of the pilots during this night
Anyways .. as this accident seem's very complicated ( flight deck and pilots matter) any clues can be important to find what happened ...
Actually we have ony the sparcely clues provided by BEA in the interim N°3