One of the things that make 'Star Trek Voyager Living Witness' fanfiction appealing is the ability to fill in the gaps. The episode leaves some questions unanswered, and fanfiction can provide those answers. For example, what happened to some of the characters after the events of the episode? Fanfiction can explore their futures. Additionally, it allows fans to give their own spin on the relationships between the characters, whether it's a romantic relationship or a friendship that was only hinted at in the original episode.
Well, the mystery and the moral questions in the 'Living Witness' story are prime material for fanfiction. Writers can take those elements and run with them. They can explore different answers to the ethical dilemmas presented in the episode. Also, the different timelines and cultures shown in the episode give a lot of room for creativity in fanfiction. Fans can create new interactions between characters from different cultures, like the Kyrians and the Voyager crew.
The 'Living Witness' episode itself has such a rich and unique concept. Fanfiction based on it allows for further exploration. It's appealing because it gives fans a chance to expand on the world and characters that were introduced. For instance, we can see more of the Doctor's growth in different fanfictions.