I have no idea why you decided to go down the story route you did. It would have been better to keep cortana dead and followed with the human side of chief that you portrayed in 4. Instead we get a thrown together, bare bones story will no development whatsoever.
Literally nothing is explained. You need to read so far into the explanded lore to have any idea who blue team is. The guardians have no explaination. Chief has no emotion at all and apparently he is a clairvoyant now. Every single plot point in the story is just revealed then skimmed over and never elaborated on.
Why couldnt it have been about chiefs struggle with losing cortana and dealing with his grief. Thats what the trailers suggested to me. Chief goes awol because he doesnt have cortana any more and it was going to be a deep and emotional journey but no, heres cortana and guess what? Shes the villain now. Its cliche and lazy as -Yoink-.
With that being said, at least the multiplayer is solid and i havent wasted my money on the purchase but i will not be buying halo 6 on release solely because the story direction is now ridiculous.