As someone who can not always log onto Destiny to purchase items from Xur, I feel that a good addition to Bungie.net or the companion app would be to let players purchase items from Xur from those places. I don't see how this could be too much trouble since we can already see and move things in and out of our vaults from the app and the website, and this feature would appeal to players like me who, unfortunately miss out on buying exotics from him.