Not really a CS item, but it's related.
Nexon could solve half the problems with its game by making miracle cubes a droppable item, a commodity, while leaving the other cubes (Super, premium, etc) in cash shop.
bolt202/veil225/feint200
Nexon is breaking the even playing field...
Spoiler!
I really want a SoK for cash items, letting you transfer between inventories, Like a Permanent pet you have on an Aran, transferring to an explorer.
Or, more ideally, getting rid of the separate inventories in general.
Oh yes thought of another one. Have the capability to change classes. Buy a change job in the CS