I am probably the only one out there that wants bloom and armor abilities back in Halo 4. But make them optional. Keep the elements of the core Halo in and also have the availability of the elements that changed the pace of the gameplay. They are great concepts but were poorly executed in Reach. If it is done right, then I would gladly welcome it as an option in Halo 4.
BRING ON THE HATE!!!
Replace bloom with recoil/weapon weight, make AAs better is what I personally wanted.