Other features we added are on critical damage, and optional for the attacker to use. They require a save by the target with a DC equal to 8 + your attack modifier:
Dazed (for bludgeoning): WIS save or stunned until start of target's next turn.
Hindered (for slashing): CON save or target has half speed until the end of its next turn.
Skewered (for piercing): DEX save or weapon is stuck in target. On your turn you can automatically deal weapon damage (no attack roll required) unless the target uses its action to remove the weapon.
Wounded (for cleaving): CON save or take unmodified weapon damage at the stat of the target's next turn.
We are still tweaking these a bit, but in general that's the idea.