Why we don't have more uses for cauldron, like Pocket Edition and Win 10 editions?

As the wiki says:
* Water color can be changed by adding dyes.
* Colors can be mixed.
* Can be used to dye items (like leather armor).
* Water bottles can be used to refill water.
* Can store potions.
* Will make an explosion sound (not a real explosion) if potions are mixed, and the potions will disappear.
* Potions inside cauldron creates potion particles.
* Potion in cauldron can be used to make a tipped arrow.

Why not have those features in the next update?