Farming is an essential part of virtually every RPG game. And yes the "Cave" was an exploit. But the problem is not that people were farming the "Cave". The problem is that the Cave was the single most rewarding, interesting and social aspect of a $500 million "Shared World Shooter". The consistent if random loot drops coupled with voiceless guardians banding together for a World event or the Massing of overwhelming enemy forces. I made more friends and stories here than anywhere else in the game. Oh and why can't I get legendary material from breaking down legendary gear? Breaking down lower tier gives me the appropriate materials to upgrade those.