A Support Item Proposal - Since you're removing Tier 3 Support Items and their Quests...
Since the Tier 3 support items and their quests are being removed from the game, I have a simple proposal that I think would make everyone happy.
Add Face of the Mountain, Twin Shadow, and Shurelya's Reverie as stand alone items, complete with their respective passives Shield Battery, Queen's Tribute, and Emperor's Favor, minus the gold income aspect. Except, lock these items out of purchase unless you've got a gold income item. This will serve two fold. First, it will allow us to have access to Tier 3 support item variants again, and the passives that we've come to love. Second, it will require that you have 2 item slots set aside to even build the items. This will greatly deter abuse, because if they're not slot efficient or they don't offer enough stats to make them viable in other lanes, other laners cannot afford to lose an extra item slot from their build to abuse things like Shield Battery or Queen's Tribute. Sure, some will try, but they would be trading out a lot of damage or longevity in order to access these passives. This works well because it grants us the option to buy these items or not, and they would most certainly be desirable power picks for supports.
Please consider this Riot. If you must take away the engaging quests of Supports, at least give us our items and passives back so we can still keep the same play styles.