I think it'd be cool if they had like a Limit on how many times you can do a Dungeon per day. Maybe 3 per day tops. Not all Dungeons, just a specific dungeon.
Might help with all these people complaining about not enough for repairs, make some stuff rarer.
Seeing posts about some guy running a End-game Dungeon 13 times a day and complaining he's not making enough for repairs...even if each Dungeon only takes 30 minutes...still almost 7 hours of Dungeons.
The average play-time is 1-2 hours according to most MMORPG studies. They should not adjust the entire games economy to satisfy people who nolife the game. This is coming from someone who does 3-4 hours. I don't think they game should modify itself around my play style. I should modify myself to the play style.
Instead of saying "Give me enough Gil doing what I want to do so I don't have to do anything else!"
Diversity.
I mean, if you can't Dungeon Dungeon Dungeon all day, you'll maybe try a craft, or some Guildhest, or Levequest, or hunt some monster with good drops in a Fate, or the like. You'll experience other facets of the game. Instead of just...dungeons.