Imagine a separate gamemode in halo were you actually used the scopes and iron sights manually like in a more modern fps having to put them to your face but with Halo's awesome sci-fi weapons. I feel like you never get to experience this with the spartans and their auto lock and projected crosshair features. It would be a very interesting way to play, of course all the players would be marines not spartans and would have to sprint and have no shields, though it would equate to a very unique way to experience this universe. Additionally, this class could be mixed with spartans in custom gamemodes to create more diverse games, where marines could represent more human characters.