I'm a librarian who loves anime, manga, and reading a wide variety of genres.
I really wonder what the thought process was behind this audiobook. Or maybe it was done this way for budget reasons? I don't know, but it's weird.
I wish one way or the other had been chosen. Either have everything read by Simon Vance, or have different people read the dialogue all the way through. Switching from one to the other is really distracting, especially if I haven't firmly cemented who certain characters are in my mind. Although I at least have the benefit of having read the book before (a decade or so ago), and I saw the miniseries when it was on TV.