I was thinking it would be easier if US2 had some sort of small compass in a corner that tell which way is "up", as in the sim orientation. There's no up in space lol =P
Something simple, like KSP's NavBall. There's been a lot of situations where I was unknowingly upside down and I thought the horizontal control inverted for no reason, so I think it would be convenient for some indicator to tell you if you are right-side up or not.