FCTM also states that "the A/T ARM mode is NORMALLY not recommended because its function is confusing"
Obviously using the ARM mode,one will need to apply approach speed correction for wind.
But having used the ARM mode for the last 6 years without any problem(only profits such as automatic G/A thrust and having in the back of your head that you have alpha floor protection),changing this now feels a tad strange.
Using the ARM mode allows you to control the speed with a back up and never did i have the problem of having it going in the retard mode,anyways you still control the thrust manually...if your speed ever goes into MCP Speed,it means you are not doing your job and is a good wake up call,always better than going below Vref.
This arm mode is i believe useful for the approach phase when a G/A is possible rather than during a visual when i disconnect the A/T but ...rearm it on final for possible G/A
