Didn't Bungie said the same about Destiny 1? I rather they build a strong foundation, & have a new Halo that is 100% next-gen & improvement.I know they've said it's a 10 year kind of service or continuation sort of game which sucks if you don't like how they've handled the campaigns so far. I know they have seasons coming for multiplayer not sure if the campaigns tie into those or not.
Not every game needs to be Fortnite or League of legend. These games worked well as they are cartoony & the visuals age better.