There are at least 2 missing support items.
Yeah , i know there are tons of different items in the game. but starting support items are missing :
+
+ 
eash of these items is supposed to hold a specific position :
|Item| purpose| money earning|Involved playstyle|
|-
|
|Allows more lane sustain|earn money by executing minions|Passive|
|
|Allows you to get rewarded for poking|earn money by hitting opponents|Agressive|
|
|Give you more mana sustain by staying around|Earn money by putting yourself in danger for this money|Passive|
|None|Helps you turn on your opponent by giving window of strenght like resistance our heal|Rewards you for landing CC on enemy|Bait|
|None|Allows your to generally move faster when not in battle, or have an interest doing so |earn money by roaming alone|All|
You might now tell me : "but we already have a support item for everyone" and you won't be wrong however, that diversity is being destroyed by the lacks of way to earn money.
you see, with this new system,
some champion will make way more sense with their support item than they use to :
IE
Can now pick item 1,4,5
can now pick item 2 and 5
the purpose of having more support item is to allow in game play-style choice so players can choose HOW they want to play the lane. This would make itemization more interesting without forcing support to choose. this way , some support would also be able to emerge and new playstyle might be born from this.