My idea to improve this would be to have prosperous increase gold gained from looting enemies and chests by the current amount. With an additional effect of increasing the likelihood of items dropping with the Ornate Trait
I'd like to see it help with increased quality drops, with the ability of finding legendary items if coupled with treasure hunter champion perk.
That would be interesting, but there'd have to be some kind of hill for players to be able to get the legendary items from over world chests.
Perhaps legendary items would only have a small chance of dropping from Master Chests, with the treasure hunter passive, and at least 4/7 gold prosperous gear, the rest purple.