I'm glad they brought up the HP levels. It also allows attacks to have multiple steps so you're at a small advantage if you're good and allows the damage each subsequent, successful action command does to be tweaked reasonably. A good example is the standard jump sticker allowing five jumps if you time it right.
Superguards are gone, and the margin for error with action commands is enormous here. So, don't expect to be messing up action commands basically ever, even if you suck at it.