I don't think many of you realize how difficult it is to write an interactive story. It was a pain for me to write short films. Why? After I write the film I then have to pass it on to the director. I have yet to meet a director who does not believe himself to be an excellent writer. They are usually wrong, but I regress. The script is passed on to the director who butchers it. After filming is done, it is passed along to the film editor who tries to fix up the butchering the director did. I know...because I have done film editing. In any event, the script never comes out like the screenwriter imagined it. The story is completely jacked up. And that's why a lot of movies in Hollywood today have people scratching their collective heads wondering, "What happened to all the good storytellers? That movie was garbage!"
Writing a novel allows me to make the story as I envisioned it. And it allows you to get lost in a world I created. The same can be said of poetry, short stories, and even music.
Games are similar in some respects to television writing. I got to work on a television set once. Fun stuff. You work in a group of about 5-6 writers. Good times. Everything is perfectly scripted. I mean, the director in this case does not have the creative control a film director does. I have not had the chance to work on plays yet, but I would imagine in many ways they are similar.
The point is, the less the story is affected by the storyteller, the more it loses its flavor. The more hands it passes through, the harder it is to keep the vision alive. So now you have a video game. It was designed by a group of writers and game programmers. Lots of opinions, ideas, etc. The thing is, unlike a movie, novel, or play, the story can be altered by you, the gamer. That's a difficult freedom to account for.
You want the story to resonant with people. Story is broken down into plot, pacing, characters, subplots, themes, etc. You want to write the best story you can so people can not only lose themselves in the world you have created, but also come away from it touched in some way. This has been the mark of writers throughout the centuries. Really, the mark of storytellers before writing even existed.
Bioware is awesome at making interactive novels. Is it perfect? No. But I love how these guys are working on making it better. And there are times, and this Leliana thing looks like it is one of them, when the creators of the story need to be given freedom too. Just like you the gamer have freedom, they the storytellers need the freedom too. Why? Because story trumps everything. If Leliana being alive is crucial to the framework of the story, then so be it.