Pierce/Slash/Crush
Here is the kernal of a suggestion for implimenting a Piercing, Slashing, and Crushing damage system.
I was thinking, there is already a distinction between physical and energy damage, and between normal and killing damage.
When you buy an armor power you are already ratioing the point between PD and ED, so why not add Piercing, Slashing, and Crushing Defense too.
Then when you buy armor you establish a ratio between Piercing, Slashing, Crushing, and Energy Defenses.
Doing the same thing for weapons is a little more difficult. Maybe the best would be to say that when you buy a killing attack you must define what type of damage it does. Piercing, etc... For a weapon that can do two types of damage, then you could construct a multipower for it, or you could ratio the points of you killing attack just like armor, or you could make an on the spot decision as the GM.