I agree with much of what has been said above. We can speculate endlessly on "crew" errors of commission or omission in the above accident, but we shall always run into the twin hurdles of (a) our incomplete understanding of systems logic in this scenario and (b) our ignorance of what was actually done in the cockpit.
This inevitable conjecture has done little to enhance Airbus's reputation, as it emits more heat than light. It may even lead to misunderstandings in the Airbus operational community, with possible safety implications.
Perhaps it is time for Airbus, in the interests of themselves and the industry, to volunteer the results of their own investigations into this matter, and any lessons they may have drawn – and others might be advised to draw – from it.