True, there were initial teething Mx problems with the new doors at Boeing. I know of one instance where some lost a finger, or at least part of, from getting their hand in the mechanism when the door opened. This issue was resolved by installing a clear plastic cover to go over the mechanism and prevent the door being opened during Mx when the cover is not in place. Mx injuries can be prevented by placing the appropriate safety procedures in place and ensuring those procedures are followed......injuries and death caused by inefficeint egress unfortunately cannot be prevented without improving the egress. I'd hate to be the one who had to give this bad news:-
"I'm sorry your son (daughter, mother, father, brother sister, wife, husband etc,) died because they couldn't get out of the burning wreck fast enough. We did come up with a better exit which may have saved their lives, but too many mechanics were hurting themselves for not following procedures designed to prevent such injuries, so we decided against it."
(Before I get reamed) I know it's harsh, but it's the brutal truth in the airline industry and a lawyers paradise.