Bungie said it themselves: if they had an unlimited amount of time, it was going to be a disaster either way given how they kept messing with everything or even starting some things over. Halo 2 might be an unpolished disaster... but it is one of the greatest unpolished mess ever created. And to the idiots defending sprint in "halo" 4 and 5: not all content gets cut due to a lack of time, content can be cut if it doesn't work or it hurts the core gameplay.