"Doing what was designed", is not a defense, it is an indictment.
No, it isn't. Like any machine, if it's mishandled it can bite.
If you built a bulldozer that someone drove onto the ice, and it fell through because the ice was too thin for a bulldozer, do you deserve an indictment?
If you built a car that someone drove off a cliff because he was going too fast for the corner, same question?
I won't keep going, because I know you get the point. The A330 is a terrific aircraft. ...and like every aircraft ever built, it can fall out of the sky if it's handled incorrectly. Sure, there are a few tweaks that could maybe help the next crew that finds themselves in the exact situation as AF447, and they're probably worth doing... But the biggest message here by far is:
- The lack of handling skills displayed by the PF,
- the evident lack of crew discipline or "professional" standards displayed by all crew members,
- and the obvious lack of training that allowed those first items above to exist, thus enabling the accident.