The Leia things works a bit better in the Saga too. In the OT all of a sudden at the end of the trilogy "btw, Leia is your sister" and then it has no bearing on the rest of the plot. But in the saga its at least set up in Episode III and you are aware of it all through ANH and ESB so when it crops up in ROTJ its fulfilling something already established. It still goes nowhere but at least there isn't that "WTF??" quality attached to it.