I really wish they would allow grouped players to share loot from chests. Nothing is more annoying than doing Grotto dungeon and having some party member running around picking all the locks and taking the loot while the rest of the group is busy fighting and dying. I'm not comparing this game to GW2, so don't play that card, but GW2 has this system and it's awesome! It boosts morale as a group to have someone yell out "Chest!" then everyone gets a piece of the pie and continues, rather than everyone being a lone wolf in the party trying to get stuff before everyone else. Now, playing among friends there is a bit more respect, but let's face it... chances are pretty high that people will be playing against total strangers, so that communication and respect is not always there.
I wouldn't mind this even for non-grouped players when there is a chest randomly out in the environment, let everyone around be able to grab something from it for a limited amount of time before it disappears.