A major issue in this arena is loss of control and then an inability to recover from the resulting unusual attitude. Simulator training is ineffective for the following reasons:
1. The simulator is not certified as accurate in these situations. You can not do aeros etc in a A380 which is the only way in which the simulator can be programmed to copy.
2. The physiological affects cannot be simulated.
Pilots need regular time in an aerobatic aircraft.