Not enough niche items for melee supports?

This is not including Locket or Redemption since they are universal and can be built on anybody. The only support items for melee tanks like Leona have is Knights Vow. While the item of itself is decent, its practically the only one they have. Especially compared to all of the support items there is for "Enchanters" like Ardent Censer, Athenes, Mikaels, and Zekes.

And this got me thinking as to why ranged supports is so big right now, because they have so many options combined with the amount of synergy they have.

One might argue that Stonebound helps melee supports but thats a Keystone, I want to talk about items here.

I personally would like to see more items that pairs with other champions and for the love of god please rework Banner of Command and Zeke Harbinger. Like have Zeke work the opposite of Knight's Vow where 12% of your physical damage or basics attacks to champions heals your paired ally. For Banner of Command, if you want to keep it minion focused, change the active where you can mark enemy champs and all of your non super minions within range will attack said target.

Those are just my thoughts though. What are yours?