I don't think the original English narrator was that great tbh. He did better as the voice of Sarevok, though.
Malady's voice actor does a good job most of the time, but Etruscan is right in that she sounds too sultry at times, which can be a bit jarring.
You hit the nail on the head there, most of the time the narration sort of takes a backseat but then when it comes in with the seductive, suggestive tones I just scream inside.