Also should think about inflation of the item economy. Right now, exotics, legendaries, etc all have a sink that take them out of the game (disassemble). Each individual has to work extra hard and spend more time to attain new stuff as they find their old stuff is less useful. What this does is prolong the usefulness of the items that Bungie has already created. If trading is implemented, these items won't be taken out of play, and it will be much faster/easier for players to get the items. As people unlock them, more get added to the game. Since They can then be freely traded, people won't be taking them out of the game by destroying them. If they aren't taken out of the game, they become ubiquitous. Then people aren't going to have anything left to work for. Bungie will then have to invest resources into creating new items all the time at a much faster rate as the current armament explodes in number and people get bored with the current offerings. In short, do you want Bungie spending more resources on creating lots of different gear ( to keep up with demand as attaining such gear become far easier) or more resources on polishing game mechanics, adding more things to do, new worlds, etc.? Not saying that's a bad approach, just a question to consider.