I must concur with your point of view on the prequels of Brian Herbert although i disagree that Kevin is responsible for the lack of substance in the books. We as readers must understand that this was frank herberts life's work and no matter how skilled of a writter or how closely related the originals could never be duplicated in the same way. But still a good series on its own, and i eagerly await The Battle of Corrin that will be released in september in the United States.
i am afraid that i was and am a bit biased when it comes to BH's work...i just feel that Kevin is more of writer based on todays tastes when it comes to sci-fi literary works...more action oriented than drama and emotional impact...but then to compare would be unfair...i had such high hopes...i too am waiting for The Battle of Corrin...
You are correct on some of Kevin's work most of his books are rushed and action oriented with little regard for character development or drama, but i have been reading lately a new series started by Kevin Saga of the seven Suns perhaps you've heard of it. The book does dwell more on emotion and feeling and the premise is interesting. If you want more information on the Saga go to www.worldfire.com/seven.html