I agree that pilot error caused the AF447 accident. But the design of the flight control system and the cockpit were significant contributing factors, presenting a situation which exists only in Airbus aircraft.

When the speed sensors failed, the flight control system switched from "Normal Law" to "Alternate Law". In normal law, the system prevents the pilot from maneuvering the plane outside the safe flight envelope by limiting the control inputs. One of the mysteries of this accident is why an experienced pilot would hold the stick back nearly continuously during a stall; the answer will never be known, but in the confusion of the event, it is possible he mistakenly assumed the flight control system would keep his nose-up input within the safe envelope. (777/787 aircraft have a similar safe-envelope control system, but there are fewer modes than the Airbus system).

The AF447 pilot not flying was apparently aware that nose up was incorrect for the situation, but he was unaware that the pilot flying was holding the stick back. Because of the location of the control stick on the outboard armrest, it is difficult to see what the other pilot is doing, and there is no feedback from one stick to the other. In a Boeing aircraft (including 777/787), both control columns move together, so each pilot is fully aware of what the other is doing. Also, in an Airbus, it is possible for each pilot to make different inputs, which did happen on AF447. In this case the computer averages the inputs, so the response of the plane does not match the command of either pilot, further adding to the confusion. (Here is an explanation by someone more qualified than me).

I am aware of the fuel icing issue with the Rolls Royce engines on the 777ER, and the 787 problems, and on one occasion I chose a different route to avoid the 777ER before the engine modifications were made. But these mechanical problems were corrected by Boeing. Airbus apparently has no intention of modifying their cockpit.