It is one of the hardest things to do, each reader/player will have their own idea in their head of how a LI sounds which can be miles a part from what the voice sounds like.
Dident know Hermione was an AI voice though thought it was a voice actor, but if its an AI then its pretty damn good but i can see how an AI will be tuff to hit emotions with if its even possible, proberly need a real voice actor for that still.