I recall a research of accidents, all allegedly 'human error', which showed how 'human error' is not just simply 'human error'. The AF A320 accident near Muhlhouse was analysed, and others.
I also recall that the AAIB report from the actual crash mentioned a somewhat different state of destruction related to the 2 engines. That looks a bit suspicious for me, as the impact was not sideways, the engines are rather on the top of the airframe so the engines or related parts should perhaps not be damaged that differently, in theory. Could it be the case the different damage might be caused in some way by an earlier in flight mechanical failure? Which is now not obvious after the destruction from hitting the roof?