I'm going to elaborate. I actually have the script on my computer here and I'm using the search feature for inner voice.
I respect that having access to people's thoughts is a great way communicate philosophies that are difficult to show visually. Any adaptation of Herbert's work is requires attention to the countless subtle nuances in his work. But it's just the mundane usage of the technique that bothers me. When a character notices something like "a knife" or that Paul "knows our ways" you can have the character explain audibly but a good actor will already have communicated their character's recognition through his eyes, stance, and face. So who are those voice overs for? Are they for the non-book-reader who is unused to to having such details explained to them audibly or are they for the book readers who already know this information?