That was pretty much the point of this thread, Heretic. Not that they had to be added right away, but to suggest good ideas for gold sinks that could be implimented in the future, when, as you said, a developer has the free time to do so.
And as I said, removing diamonds from the loot table compeltely, or at least all but tiny and have them drop rarely so new players could find some instead of buying. That way, with people needing to buy the diamonds from NPCs, it takes the gold out of the system, and when the diamonds are used, removes it completely.