About the way to show the wind direction reference, you say …."left to right, bottom to top, and north up". The first 2 are not very useful unless you are heading in exactly those South to North or West to East directions….
Even if you are not heading exactly in these directions, these settings are useful. They are currently used by aviators, and they can be explained for sailing too:
Using Route planner for sailing, these wind direction references can also be used specially " Bottom to top ", if you imagine your boat heading the top of your screen, you get the angle of true wind with your course:
A first step for me would be to display as an option the true wind direction in degrees not only as arrows. Then apparent wind speed/angle if you like. But as the boat speed is the averaged speed for the whole trip, I am not sure that AWA and AWS would be really precise. Or the polars of boat/sails should be included.