If you're like me, you use WS B as your primary way of getting out of full crouch. I'm starting to think 4K would be a better choice, since it can also be done from FC. Here's a quick rundown of the data:
Move / Dmg / Speed / [Frames on Block / on Hit / on CH]
WS B / 16 dmg / i15 / -8 / +2 /...