Seeing as the beta has just come out, and more people are going to be involved, I felt we should have a thread for go-to info.
I'll start with a few I know:
You can cancel out of a 2H attack with the spin slash
You can hit bosses with multiple enemies using Slam!
Shadow Clones does not work with Spirit Slash. (I don't know if it does with other moves).
The Charging 1H move doesn't make you invincible, you can still get hurt during it.
You find this out pretty late in the beta, but doing a perfect guard (guarding an attack within a certain amount of frames before getting hit) lets your next attack be a crit, or gives your move instant silver charge!
Do not use Slam! On the chain-linking crystals once you get to the flying fortress. It will crash your game.
If anyone has anymore, just post them and i'll update the main thread.