Ok i went in to this knowing hardly anything about the previous movie (i tried to watch the original a few years back and its bad)/didnt read books
things i liked
Oscar Isaac was probably the best performer in the movie and the beard works! could totally see him being cast in a medieval movie
things i dont understand
Vladmir- Why does he setup Letos family? Dont want to spoil things but his servant gives a look when the doors close but then all is ok?
the planet itself-Do the people such as Thufir knowingly hide how bad things are from Leto? Are the worms (one in particular judging Paul ? why was it looking at him?)
Was Pauls battle with Stilgars people in the books?
Josh Brolins character. I think i lost track of what happened to him
Who was Momoas character? how was he tied into the chain of command
things i didnt like
it was slow at times. Lots times battles seem over and then new waves just spring up.
shields and darts . battles made no sense
One minute you need a toob in your nose and then sometimes you dont
the thumper? was that supposed to mimic the rabbit? seriously its like a whale chasing an ant to food?
it wasnt really explained why one group was motivated to destroy the other? Theres this false honor where you cant do something but then they break it anyway
I give the movie 4/10. Its not something i would recommend. It is not as good as the first few seasons of GOT. its not a good war movie. I was never on the edge of my seat. i wasnt wowed by any special effects
What Payn said in his post responding to yours- there is a whole political and world-building backdrop that Villeneuve only touched on or flat out ignored when making this version.
The primary reason for the lack of technology (aside from starships and such), is that millenia in the past, mankind fought a war against its own machines and AIs, and they have been banned ever since. (The Butlerian Jihad) This led to a rise of mental disciplines, which are centered primarily around the Bene Gesserit sisterhood, the Spacing Guild (composed solely of males), and things like the Mentats (The human computers). Thufir Howatt and Piter Devries (the latter never even gets mentioned by name, but he is Baron Harkonenn's Mentat) are Mentat Assassins.
The idea of the Kwisatz Haderach (which the Bene Gesserit are trying to breed by crossing centuries of human bloodlines) is basically a prescient 'superbeing' of sorts, a
male Bene Gesserit who can bridge the gap between the
yin of the Bene Gesserit disciplines and the
yang of those abilities open to beings like Guild Navigators (who are all male). Jessica and the Reverend Mother of the Bene Gesserit believe Paul is potentially the Kwisatz Haderach- and that is why Jessica has been training him in the Bene Gesserit disciplines, like the Voice, something which would never normally be done with a male child.
If you enjoyed the movie, you should really tackle the first book at the least. All of this is explained in detail and more. It's truly a magnificent work of sci-fi and social commentary. Also, if the second movie gets made, more will almost certainly be brought to light.