Coop (or campaign multiplayer) takes a much larger load on your PS4 or Xbox One than any other game you could play on your gaming system. The more stress you put on your gaming system, the shorter life span it has and less functional it becomes. In order to prevent your PS4 or Xbox from slowing down permanently, coop mode should be removed from Destiny. This should help increase the quality of other multiplayer modes meaning that everyone benefits with faster connection speeds and better graphical quality multiplayer games. It's similar as to the reason why split screen is no longer in Destiny. It helps improve the quality of the game. You can still play with your friends, but you also get to enjoy campaign, and everything runs much faster and much smoother. Do you think it would be a good idea or are you willing to allow your gaming system to slow down and be damaged permanently, decreasing the quality of the rest of your Destiny experience?