Not sure about the show yet, gotta watch maybe 1 or 2 more eps to fully judge it. Displeased with the writing of the characters, armor and design of the sangheili. The armor of the Spartans could have been better and along with the introduction of them into the scene could also have been done better. But for the brutality of the covanent shown is not bad, infact I'd say that's something that was done right.
I understand that the writers want to have creative freedom from the games/books and don't want to be restricted by them is fine, but it seems this decision has actually lost freedom for them to write a good script for the story, or it seems this way so far.
I think where this most shows is in the characters, as they don't sound like the characters from the games or the books, infact some of them shouldn't be in the job positions at all for their judgements and actions from what I've seen of the first episode. This I think it most notable in the shows Margaret parangosky, who could have be prorated better script wise. Another character this noticeable in is the master cheif himself, I think pulling a halo 5 move in the first episode wasn't a good idea, to set mood and them of the story.
This is all I really can say so far given that I've only seen 1 episode, so my rating for the show and opinion my change once I've seen a few more episodes.