You would have over a million Guardians who just had the most powerful weapon in the game handed to them as if it were candy. As opposed to the first time he sold it, most players can now afford to buy it several times over. The amount of time it would take to breeze through PvE content would be reduced now that thousands upon thousands of fireteams are running around with maxed out G-Horns. Bungie has shown that they are very quick to "adjust" things that benefit large portions of the playerbase...