This would allow for some much-needed variety. Prime example: I've been grinding for Luna's. I chose to start and pursue that quest on my hunter, but recently I've really wanted to play some titan and warlock. But oops, I can't, because I need to get the Luna's stuff done, and the quest steps won't advance on my other characters. So until I either get Luna's or abandon my quest, I'm strongly discouraged from playing Crucible on titan or warlock. Same for Redrix's Broadsword. I'm about 2/3 way through that quest, but when I think about jumping into quickplay on titan or warlock ... nope, I'd better stick to hunter, or else I'm not advancing my quest steps. It's just stupid design. Why would anyone ever want or need more than one of the exact same exotic weapon? This should be fixed. A fix will ultimately result in more people playing the game more often, because they can jump from character to character without "downtime" on long, difficult quest steps.