My thoughts are having a means to judge precise angle of turn is essential in traditional navigation. At least if one is interested in accuracy and repeatability. I've often wondered how handy this could be to have for general mapping and to more easily mark the position of an asteroid or derelict.
What I think would be a great feature is if you could point your ship in an arbitrary direction, hit a key to store that direction as zero and than measure deviation from that with a 360 by 360 readout. To make it work properly would still require having classical presets you could toggle between like reset and Zero nav gyro to solarsystem plane/center or reference to galactic plane/core. The only thing left to decide is which way is actually up :/