Here is a quote by the shows creator " the show's focus was on its characters and their world, not on replicating the Halo video games."
I saw a post online from a writer of the show. He said that they didn't use anything from what drafted up. He didn't say the show was bad, but he said it's nothing like what he wrote. So, just saving face so he won't get blacklisted for criticizing it.
The last episode was alright. I'll give the first season a generous 7/10. It has some good moments, some bad moments, but was a decent sci-fi show.