Nothing wrong with the writing of Halo 5, the point with Halo 5 was it was chopped up into 3 different parts. A trilogy which means that Halo 5 had to lead up to what's next. The story has already been written awhile ago and if you have finished Halo 5 on Legendary you will be excited with Halo 6. There's much more to come in the Halo Universe. Even though Halo 5 didn't live up to expectations from the adds, it still has one of the better stories for a FPS game.
This I agree on alot.
Halo 5 is one of the best stories in gaming.
Its alot like Episode 5 of Star Wars. Without 6 it leaves alot tobe desired storywise. I believe when Halo 6 comes out it will flesh out 5. Halo 5 is the middle of a trilogy, and has not been afraid to turn existing loved characters into other things.
Its just 4 was so good on its own, which is why 5 feels a little disjointed without 6. Same way 2 wasnt liked until after 3 released.