Best Dificulty

Difficult:

In this update, silverfish will have a propagation limit. Its propagation will no longer be unlimited.

If you hit an iron golem and make the tower to farm their iron now they can jump to hit you

improved enderman block grabbing mechanism

The blaze has double life and added to that if you hit it randomly it can make a small explosion (it does not break the spawner)

the piglins will no longer have shields
Now instead of trading you ender perls they will give you snowballs

Easy

the piglins instead of giving you ender perls will give you ender eyes