Well, four episodes in let me give my thoughts.
Firstly, Neil has been, as always, spectacular. That said, the way in which the show has been presented has been a little underwhelming. I'd like less to be spent on special effects and visual wow moments and more time just dedicated to having Neil explaining things. And during the cartoons having the language be modern and hip just falls laughably flat at times.
I think the evolution episode was the best so far, and the newest was the weakest, just because it went to the fringes of science and took on too many big ideas in too short a span of time.
As for the comments about religion, they absolutely belong in the show. While it is true that science and religion (in general) do not always need to but heads, the religious beliefs he has confronted in the show absolutely 100% fly in the face of scientific reasoning.
As someone who gets the shitholes of programming that History and Discovery have turned into, but not Science or H2, this show was a welcomed addition to my DVR. That said it has been good, and not nearly as good as it could be.
Edit: And NDT told a local radio station that Seth was crucial to getting it on Fox, and he loved the idea because it brought the show to a wide audience, which was the point of the original Cosmos.