Ancient Coin should not Give Most Gold
The most passive support item should not be the one that gives the most gold, at least not by the margin it current does (I see ancient coin users easily have 2x the gold generated than spelltheifs or targons by mid game).
Yes, it has the worst stats of the 3 but it also has probably the best upgrade (bonus MS for allies). Its gold gen maybe shouldn't be as weak as it was but it should be nowhere what it is now.