Was the trim issue the main obstacle to recovery?
Since the stick was never pushed forward in an effort to unload the wing (reduce angle-of-attack thereby breaking the stall), it's hard to say...but having done an "amateur" reproduction of this event in a 320 simulator, I found it impossible to reduce the pitch below 12deg down, and the aircraft remained stalled, as the FPA was around 40deg....it required manual inputs to the stab trim in the nose down direction (as it had obediently driven to the full "nose up" position) to achieve the negative pitch down to reduce the angle-of-attack...keep in mind my experiment was from reading the report, not in the least bit a scientific-based simulator back-drive...