To make Halo 5 more than just shooting, puzzles should be implimented. Metroid Prime does a good example of this. In Metroid Prime, as Samus progresses through the game she unlocks new armors, new weapons, and new abillities by finding them by completing a puzzle or exploration.
When you achieve one, a cutscene plays.
Halo 5 should use that same concept, they should let you unlock spartan abilities as you progress throughout the story, and when unlocked, you can switch between them in the pause menu. Once you unlock them all, anywhere in the campaign you should be able to pause and switch abilities. When you unlock one…A SHORT CUTSCENE WILL PLAY SHOWING CHIEF’S ARMOR UPGRADING.
The campaign should also be more than just shoot this, destory this, ect. They should have some puzzles. Last of Us saved it’s self from being a non stop shooting walking simulator by featuring puzzle segments where you had to get a ladder down, boost your partner up, or make a bridge with a ladder. Metroid Prime always has places in the single player where you need to use your abilities too progress.
Halo 5 should feature some puzzles in campaign that require you to use your abilities to solve them or progress. For example in the campaign there could be a ledge that is too far for you too reach so you use the clamber ability you reach it. Or there could be 3 switches that you need to hit too open a door, and to active the switches you must ground pound on each in a certain order. Once you solve a puzzle allowing you to progress, A JINGLE SHOULD PLAY.
I think it would be great to innovate the campaign, and make Halo more than just non stop shooting and killing. 343i, Please throw in a bit of exploration and puzzle solving.