I think it would be helpful if the Pitch Compass view displayed the root of the selected key at the top. This way, the tonic is always at the top, the major 3rd is at 4 o'clock, the 5th is at 7 o'clock.
It might also be interesting to try hiding some of the note labels when you select a scale from the combo box (to match how the Pitch Contour view does the same thing).
I think it would be helpful if the Pitch Compass view displayed the root of the selected key at the top. This way, the tonic is always at the top, the major 3rd is at 4 o'clock, the 5th is at 7 o'clock.
It might also be interesting to try hiding some of the note labels when you select a scale from the combo box (to match how the Pitch Contour view does the same thing).