I personally believe the best option is to decrease the DPS required to see a chest drop. Having it set to all greed, while annoying, keeps people from farming it in the DF until they hit 210 and stop playing until next Alex patch. I foresee us getting some restrictions lifted once 210 is obsolete, but until then a decrease in the requirements to see loot drop could keep people from dropping out as soon as they see two people gathering.