Brilliant post, i agree with everything there except for the unique star system, it would make it easier to navigate but having large structures or intergalactic objects e.g..: stars, dwarf plants(small planets, not large discs), super novas, nebulas, home base of pirates(?), comets, black holes, asteroid belts, etc. visible from anywhere would not only have more things to explore, but have landmarks to help navigation, i do like your ideas, but they would almost certainly drop frame rates, and if it was disabled it would, as you said, make black hull invisible.