One must adapt to survive, the same goes for video games. Halo has to become more like COD to include competitive aspects and all that jazz. It's a necessity. Halo 4 isn't a COD Hybrid anyway, it's a lot worse than that. Halo has crappy vehicles that are easy to destroy and Halo 4 only has Ordnance Drops.
There isn't anything that makes the Halo 4 Multiplayer special and desirable.