Some lay questions
I'm not a pilot (my domain is psychology), but I like aviation. I care also for my safety, so I stay informed: in fact, I were in Brasil when the crash occurred, and it was quite impressive.
I wonder why Airbus did maintain a somewhat complicated landing procedure with one locked reverse (first both to idle, then only one to reverse) that the two TAM's pilots followed, probably in a wrong way. Sidstar says that they changed it on the MEL, but, after two crashes (Philippines and Taiwan) with similar dynamics (and probably some other occurrences where the pilots discovered quickly the error), a change in the software i.o. to unify all landing procedures, with or w/out reverse, should be implemented. When you are relying more on perceptions than on logic (and it occurs), the image of two asimmetric levers can be misleading.
And I would ask to the pilots flying on A320 if a warning when the engines of the plane are pushing one in the opposite direction of the other could be useful