The real issue ?
There is lots of discussion on what pilot should/should not have done, but not much comment yet on how or why the door came apart in the first place (which it seems to have done from the pics). I am assuming thinking is that is an operational problem rather than a design one, or a fault, otherwise there would be cries of 'ground them all till we know' ?
Hope I am not being thick, just SLF myself !