Late to this discussion, but my theory is that they picked Malady for the voice for a good reason. She has the perfect voice to narrate but also creates doubt and suspicion. I mean that's what some narrator's job can be. Not just tell you what you are seeing and hearing, but induce doubt in you.
I mean, think of Kreia. A script alone isn't enough. Even a good script. You need the voice, the right kind to bring it to life and give you what you want to see, and hear but also feel...
