An official but WIP port of my Java mod, Mob AI Tweaks
Original: Mob AI Tweaks for Java Edition
Refer to the description of the original mod for some context
Reworked mobs so far:
General Hostile Mobs:
-Now have a 1% chance to spawn with permanent invisibility, regeneration (unless undead), strength, or speed (most common, and replaces regeneration for undead mobs) like in Java. Note that phantoms and creepers are an exception to this.
Skeletons
-Now have baby variants
-Now uses a nerfed version of their Java AI (if you want this entirely standalone, refer to my other addon: Java Skeletons)
-Baby variants do not strafe, they only back away from their targets.
-Wither Skeletons can now shoot a weak wither skull when their targets are too far (Attack animations from Java version included!)

-Strays jump and throw a barrage of snowballs (Backflip animation from Java version included!)

-Bogged jumps away from their target and leave behind a short lasting poison cloud (Dodge animation from Java version included!)

Zombies
-Zombie pigmen can use crossbows
-Zombie fletchers spawn with crossbows and use them

-Zombie clerics now spawn with splash potions of harming and uses them to either attack or heal other undead mobs

-Zombie villagers now attack illager mobs

-Drowned now lose their tridents upon throwing them and now need to pick it up

(Ignore why I'm poisoned here, I forgot to kill the bogged before testing)
Illagers
-Evokers shoot a small fireball every now and then
-Pillagers can shoot from twice as far and will strafe backwards when targets are too close like piglins do in Java
Creepers
-Dealing damage to them delays their explosion

-Does not work if they have been detonated with flint and steel
General Passive Mobs:
Villagers
-Clerics will heal injured villagers and iron golems

Chickens
-50% chance to drop a feather upon receiving any damage
Those are all for now!