You forgot the ridiculously detailed, rich and vibrant sound! That soundscape as you undock is just nuts, on a good set of cans. The best I've ever heard in a game. Love ED!
Edit: I played on a 34" ultrawide with TrackIR and the Warthog HOTAS. The immersion is staggering. Sadly my throttle has died so it's on hold until I can get a new set.
What E:D does have is an amazing flight model, great visuals and a genuinely well-made physics engine that offers a surprising amount of realism. It's the most "you are a real pilot in a real spaceship" feeling game I've ever played. It just needs more depth to the actual game beyond that.