That's part of it. But different random number generators ( R-N-G) put out very different distributions. Bungie has had a history of using RNGs that tend to produce a LOT of outliers....instead of having lots of people cluster around the average. ...and I'm not here to really complain (I only stopped by because the thread was here), and my experience really mirrors that of the people who are here to complain. That the drop rate is OKAY (not great) in the SIVA Crisis playlist....but is ABSOLUTELY horrible in the Heroic play list. I Only played the 320 list of a few hours and got three keys to drop. I've played the Heroic strike list over the last 10 days, and have only had ONE drop. So the problem is REAL. However I think you're suggestions for dealing with are good ideas.