The Overmind *warning, potential spoilers*
So far, I am pleased with how Sci-Fi has done this one. Some things were left out I think more due to them being obsolete and having to make it a part of the present and near present timeline.
You have to remember, when the THREE great science fiction writers wrote a lot of their novels, we had not yet put a man on the moon and we had Astronomic engineers, we had not yet "invented" Astrophysics in it's place. I know this because my family is full of engineers, including Mike Collins who was one of the astronauts on the moon landing flight. That being said, these guys could make up whatever they wanted because of the limitations in that area of science during their time. If you read Ray Bradbury's The Martian Chronicles, it had Earth men being able to land on Mars and breath the air, something we know cannot happen.
The story ends on a bittersweet note, but I would have thought by now that there would be some mention of the Overmind and the situation with them and how and why the Overlords cannot be part of it. I really hope Sci Fi does not leave that out.