Trooperman and I discussed this very thing in the Shroud of the Dark Side thread. We’re both for Anakin disappearing in the last shot of Luke w/his body on the Death Star. I don’t know how to do this either (“wishful thinking,” haha), but I’m sure someone here does. As for Qui-Gon, I originally wanted it to stay as is, making the same point you did: there would be some kind of reaction from the onlookers if Jinn were to disappear. But TM noted there should be SOMETHING different about Qui-Gon’s death to explain why he was able to come back from the netherworld and other Jedi were not.

The key to this is Qui-Gon’s explanation of the path to immortality. Are we indeed going with no “explanation,” just to have him stay in contact with Anakin through dreams and intense circumstances, and then appear to Obi-Wan as he walks off into the desert? Subtleness has its advantages, but that might be so subtle to the point of confusing.