Idle reverse is a bad habit. It builds a 'muscle memory' and a mentality that has led flight crews to not use full reverse even when it is needed.
More than one runway overrun has been attributed to this.
Certainly the autobrakes will 'back off' to provide the requested deceleration rate when full reverse is used.
That is fine, unless you get the reverse in at higher speeds it is far less effective anyway. Once you have selected max rev you can brake as necessary.
This allows maximum use of all braking / deceleration devices as they are most effective.
Remember when this was standard ?
I have flown with more than one FO who was afraid to use max reverse even when required, concerned he would 'break something' or use an extra 100 pounds of fuel.
I use max reverse on every landing and brake as necessary, I know you will go on about carbon brake heating, so what, who cares about the brakes when you are off the end of the runway ?
