I think the Halo 5 campaign story is great because it sets the premise for bigger and better Halo.
You already have a topic open for this OP
https://www.halowaypoint.com/en-us/forums/6e35355aecdf4fd0acdaee3cc4156fd4/topics/let-s-talk-halo-5/2240a439-ada9-4e00-9ba9-00a00b207253/posts?page=1#post14