The afterblow is supposed to make fighters act with more concern for their safety. But whether it does or not is a different story. Lets have a look at the problem with the power of math.
I recently came across a statement to the effect of “Having a 4 point target with only 1 point deducted for afterblow is too little. No matter what you still get 3 points and it doesn’t encourage the fighter to protect themselves.”