Like many other MMOs, XIV is in need of changes to the loot options. A party leader needs to be able to disable the NEED option in instances of greed parties, and these changes need to be clearly listed somewhere on the party menu, and should only be able to be activated before entering a dungeon/instance (changes during would be quickly abused).

I'm sure many, like myself, have now experienced (six times over) joining a Greed party, with an established loot table, and established and agreed upon loot rules, for someone just to Need on an item and dash. It's reaching a point where it isn't just low or random drop rates preventing item progression, it's the community itself.

This would at least help to alleviate this issue.