Diesel,
Great explanation. I have one problem with what you said about 'Auto Thrust ON/FD Off' scenario.
As you said, this will place the aircraft in 'speed' mode - hence the speed bug will dictate what thrust is demanded. If the bug happens to be faster than the flap limit speed, then the flap limit speed will be exceeded. The only speed which the aircraft is designed to protect is VMO and MMO...and then only by applying an increase in demanded pitch - not a reduction in thrust.
In a go-around with FDs 'OFF', the trick is to nail the pitch attitude, reduce flap by one config, get the gear up, do nothing until acceleration altitude. At acceleration altitude, leave thrust at TOGA until you have selected or you have confirmed that the aircraft is scheduling a suitable speed, ie better than green dot. Then you can bring the PLs back to climb, engage FDs, AP and call the FAs for more coffee.
God, if only it went so smoothly in practise!
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