Interesting thread.
The 1-11 would show auto-ignition first, then the shake, followed by the push. Nitrogen pushed the controls via a ram piston.
We routinely took the 1-11 through to the push on base training. In the days before sims of course. It was a fairly gentle change of pitch at stalling speeds.
An acquaintance of mine heard the tape and described their voices changing as they kept the report going. The crash footprint was not much longer than the aircraft.
The spoilers came out at an aileron angle of >4degrees I think. At 250 kts, the rate of roll was quite unbelievable for an airliner.
Even assuming that this system had been available on the prototype, the airflow would have been such that the spoilers would not have done much.
I think the push in Pappa India went off several times did it not?