Brewing Stands can be found in Igloos, and apparently the devs forgot about Nether Wart still requiring players to find Nether Fortresses in order to brew most potions, with the sole useful exception of Potions of Weakness.
A new ranged weapon based upon Guardians. It also gives a true reward for fighting them, which means that it fixes two complaints with a single item (Technically two).
Weaponized rockets. Now rockets can be used as weapons (I didn't think of a good subtitle of sorts).
New uses and tweaks for common items that lack uses. Making some items less unbearable.