...but really I think Qui-gon should disappear. It would match OT and Qui-gon's ghost was supposed to teach Obiwan on tatowine how to do this, right?
Is Qui-gon allowed to 'ghost out' ?
Obi-wan ghosted-out at death.
Yoda ghosted-out at death.
Anakin did NOT ghost-out at death, but instead had a funeral pyre.
Qui-gon also had a funeral pyre.
If one were to do as you suggested, one is then compelled to remove the funeral pyre scene from EP1--so that is something to consider, too. If you like that moment in the movie, then you are kind of stuck with the original death sequence.
Of course, removing the funeral scene is a simple matter. But is the issue just as simple?
Are you sure that Qui-gon should (or needs to) ghost-out at the moment of death? I have to check again, but someone I spoke with seemed to "know" instantly that Qui-gon cannot ghost-out, based on a private conversation between Yoda and Obi-wan.
- EDIT
While we're on this interesting topic, how about adding Qui-gon's ghost to the ensemble finale in EP6? I'm not sure if he can be positioned into the frame, but it's something to think about.