Replying to Torn ACL has me rethinking my bindings(Revisited)

Long story short, I came in low on a soft landing and got booted. Tomahawked and came out with a complete tear in my ACL, because the binding had no vertical release function. That was a jester... Overall which would be more safe in this sort of fall if the situation were to happen again? STH2 13 or Pivot 140? I know the pivot has a forward release in the toe, does the STH? Or is it just alot of elasticity?