Re full power immediately for stall recovery
As a digression - Immmediate power application is something Airbus pilots (and others no doubt)are 'unlearning' in the sim.
Airbus say (amongst other things) nose over to break the stall then, when no symptoms exist, then gently increase power.
Also at high altitude a good whack of nose down >10deg has less height loss than a 5 degree or so nose down. Your ROD might be double, but your speed recovery out of the symptoms happens in under half the time.
And back on topic, and Airbus also says level the wings simultaneously with decreasing the AoA.
FWIW, I recall being taught to hold the control column level and recover with rudders at one of three linked schools at Moorabbin in the early 90s.....