this is a good idea, and not easily exploitable (I certainly can't think of any in game mechanic that would cause this to be exploitable). Bungie should consider this because it would fix the problem some players have with luck. I want the hard light, but my friends constantly get it, and after ten weeks of trying to get it, I have seen at least 5 people who did not want the hard light get it, and both me and them wish we could exchange rewards! THIS IS A GOOD IDEA! DO SOMETHING LIKE THIS, AND MANY PEOPLE WOULD NEVER COMPLAIN ABOUT REWARDS EVER AGAIN!