Two-point slope and elevation labels

A dynamic, two-point label would be extremely convenient for labeling delta elevations and slopes between two points on a surface. Ideally you would be able to preset the surfaces and text styles, then click one time to start the command, then two more clicks to drop the ends of the label. It would ideally show an arrow for slope direction as well.
This may help solve this request as well: Label Line Slope With Flow Arrow


This would be a great feature as well.