Ok. So I read the first page, but I don't see anything other than complaints about the lines being different in this movie versus the book (or the radio or the tv series). Movies are first and foremost a visual medium backed by (hopefully) some character development. The strength or failure of the movie will not rest on it's trueness to the literary words.
IMO, the movie will succeed if it is playfully silly with a hint of nihilism. It will fail if it takes the material to literal or serious.