Moving Thrust Levers and Autothrust.
Scenario - engine runs down on approach.
You are stable at Vref, in landing configuration, thrust stable, hands and feet on controls and thrust levers. An engine runs down. You observe speed decay and roll, possibly yaw. (I know the a/c will yaw, but you may not notice.)
The thrust levers advance - fine, you accept that autothrust is increasing power to compensate for the speed loss.
BUT you can only tell quickly what has happened to the engines by looking at the engine instruments. Did you all read that? You have to look at the engine instruments. Competent pilots with moving thrust levers regularly scan those instruments to make sure the engines are doing what their hand tells them. Competent pilots with stationary thrust levers regularly scan those instruments too!
I have enjoyed flying both Boeing and Airbus types. But the best airliner I have flown was built by Douglas.
TP