I found the different weapon classes (slashing, piercing and bludgeoning) utterly pointless. The weapons in each category are identical. In Divine Divinity they had their place; swords being fast, axes powerful, hammers fatal, etc. I have seen no difference between any of the statistics for weapons in the three categories in Beyond Divinity, nor in their skills. So all you get from training in a particular path is proficiency with one third of the random weapons in the game.