My thoughts?
I don’t want them reusing footage or using cgi for Episode IX. This is all obviously dependent on how things play out in VIII (and whether or not they simply make changes to that movie as well), but what I would want them to do is to take a page from how Leonard Nimoy’s death was addressed in Star Trek Beyond. Early in Episode IX, have a scene where a group of characters return from a battle. It was a victory, but General Organa was killed leading the Resistance.
An idea someone posted in the comments at birthmoviesdeath that I actually loved:
“(at some point) cut to a memorial statue or plaque, and we dolly out to reveal a person (Finn? Poe? Rey?) paying their respects as they pass by before joining a meeting or on their way to a ship or something.
They could even touch it and say “for luck” before moving on.”
I really like both of those ideas. That way they could give her the heroic death she deserves but not have to kill her on screen (since that may be considered in poor taste).