I'll go over what I know
6b is 2 hits, first hit over head. Safe on nonIB, knocks down.
6a moves forward still + frames (invul starts later)
6c faster and staggers longer depending on charge (6c ch mugen works) fully charged 6c launches like crazy on full hit, also does a guard primer
I'm pretty sure all of his normals can be D canceled now too.
Shippu is 2 guard primers, Zantetsu is a guard primer.
Mugen still lets him remove guard primers. I'm pretty sure all of his C attacks are 2~ frames faster.
If you were wondering about the notations for his moves
J.c is the long ass poke
j2c is the old jc
j2a is the sword bunt.
Hakumen's projectile properties are pretty hype. Hakumen isn't put through hitstun anymore THANK GOD. the orb will stay out for 2-3 seconds? if it is hit by another projectile it will refresh the time it stays out. the orb also hits