The changes are as follows:

Zombified Piglins will now pillar up eachother if you're too far from them vertically.

The more Zombified Piglins there are, the stronger the climbing power is.

Evokers will now apply a curse onto other illagers, the curse will cause them to summon a spiral of Evoker Jaws on death.

The curse is signified by a green circle of eyes around the illager.
Curse

Breezes will now correct the movement of arrows near them to their target. The aim correction's speed is limited.

All hostile mobs will now flee from lit creepers. Creepers will now hold the fuse when there are hostile mobs extremely close to them.

Witches now give illager-specific buffs to them, instead of exclusively regeneration and instant health:

1. Infected on all illagers if they don't have such.

2. Strength on Vindicators.

3. Speed on Ravagers.

Zombie-Type mobs will now find and ride an animal (Cow, Sheep and Pig) when they're far away from you (over 16 blocks).

The animals gain a decrementing speed boost. When the speed boost fully falls off, the Zombie will get off of it.

TeamWork