The thing about having an epic attack matched by the weaker defense with equal charge, it's not op for the attacker to have a more epic attack then the defender has defense if he would specialize in attack, so of course he's not going to be blocked by an average joe defender who puts 1 charge into defense against the 1 charge specialized attacker. The 1 charge versus 1 charge makes sense if the attacker's attack is around equal to the defender's defense and that it. Otherwise the common sense begins to break down.

The two concentrated attacks point, which you agree with, is the same concept. What if my character has a super durable weapon as his main point, balanced out with his other stats? Nope, his main advantage still breaks as if a bamboo sword a character could be using. I realize that it's a target of the weapon, but I can target a steel sword repeatedly and might not be able to break it unless I had a good weapon or something in return. There's no way I could be certain to break his sword in two hits or any predetermined hit count we give to everything.

The grapple thing is yet another concept going along with this.