Thanks guys, that clears things up a bit. I guess I didn't consider how such a small amount of fuel could add up. Also, I didn't consider the F/A noise reason (we don't have those, lol).
However, I'm not following CRJ700's reasoning with ITT- unless your engines are cooled differently. For us, the engine depends on airflow going through the oil cooler to keep the oil temp down (not ITT), but it will heat up just as fast in feather as it would in beta, as both modes have little to no rearward airflow. We're supposed to use beta to come to a stop, then once stopped, come out of beta to allow some rearward airflow to keep the oil temps down.
How would feather keep the ITT down better than the combination of Alpha and Beta used for taxi?