Make Tier 3 supp items OP?

I remember a while back Riot was talking about how is OP in terms of normal rules for gold efficiency because they felt that melee carries and the like need the extra teeth since they are competing w/ the fundamental strength of range carries.

Is the same stat stuff done with tier 3 gold items? Should it be done if it isn't? I feel that they are a deep enough gold investment that it wouldn't break the game if they were more efficient than other options, especially if you attach the OPness to the new quest mechanic.