Don't go back and watch those ViDocs. They will make you weep. They showed a LOT in them that isn't in the actual game. Including different upgrades, different chests, and different descriptions for weapons. They even showed fully working footage of The Reef, which obviously has content ready....just maybe for future DLC? See, the problem is. Destiny had huge changes quite a few months before the actual game released. Some people left, and design directions changed because of that, hence why so many things are different when you compare the ViDocs and the actual game.