Well i think most agree that bungie think their "10 year plan" as it is now possible for every single game. Take diablo 3 for example. If they would apply bungies "10 plan" as it is now, they would a 10 plan by releasing/locking away all but one acts and only release 1 act about every third year. Which people would never go for cuz they know this was thought of as one even by development. Instead of how blizzard did, which were released the game which were thought of as one. Although it had it faults as auction house. But then they released an real expansion that truly did ADD to the game. Not just unlocking what was already there