Since a grade is supposed to correlate with how much you've learned, I'm not convinced higher resolution is necessary. It's already fuzzy how well any grade can represent actual knowledge, skills and experience gained.
Improving the precision doesn't necessarily improve the accuracy. But if improving the precision increases our confidence in the metric - without necessarily increasing it's accuracy - maybe we're better off not doing it.
Improving the precision doesn't necessarily improve the accuracy. But if improving the precision increases our confidence in the metric - without necessarily increasing it's accuracy - maybe we're better off not doing it.