Also, @Riot, while you're looking at items and early game choices, I feel like Avarice Blade is quite lacking when it comes to GP10 choices. Crit chance does very little for supports. Someone falling behind in their lane wants more reliable bonuses for dps or survival. If building towards a Yomuu's then The Brutalizer is much stronger for the gold spent and therefore gets bought first, then active on Yomuu's is good enough that the Avarice Blade will only exist in the player's inventory for the short amount of time between when it's purchased and when 600 more gold is obtained.
For bringing more utility to the Avarice Blade, I would suggest changing it from crit to 12% lifesteal, and having it build into Executioner's Calling, Bilgewater Cutlass, and Wriggles Lantern. All three already have an active effect like all other GP10 upgrades, and that active effect can be successfully utilized by a support. This change proposal is somewhat more oriented to junglers or top laners, who would be able to really benefit from the lifesteal and the upgrades, while the lack of an strong AD upgrade will help deter AD carries from it (but at the same time give AD carries a GP10 option if they feel they have a tough matchup).