So many questions...
I thought House Atreides was suppose to be powerful or decently powerful. Why no orbiting ships to have an eye in the skies sort of speak? I know the Duke had a sense something was not right or that he somewhat knew his House was being played yet kept it within the family and slept soundly until it was too late. If he could notice something wrong later on, why couldn't the others? All the great leaders (Gurney Halleck, Duncan Idaho) were seemingly sound asleep. Wtf were the spies doing after the failed attempted assassination of Paul? Sleeping on the job too?
Seems all Houses use the same or have similar tech strength.
House Harkonnen only gave them a small base, gimped silos, and one junky harvester. Why bother with them? Because the Empire deemed it so? If the Harkonnen already control Arrakis, wouldn't they be strong enough to defeat the Empire alone let alone any other House? Or is there some agreement between the two?
Does the Bene Gesserit work for the Empire or play all sides? All Houses too afraid or greedy to gang up on the Empire?