Launched the game, selected my bash and dodge keys, set the decapitation to 30% (might be called something different, don't rightly remember atm)
Grabbed my mace, and went out to smack around some stuff. Fought ogres, imps, bandits...didn't really notice any changes. Bashing didn't really look like it was doing a whole lot. I did notice my power attack animations were different...kinda funny to poke something with a rounded stick and have it hurt. Probably looks better with a sword, though my wife found the animation hilarious
I'm wondering if I'm expecting too much, or it is because my character is only level 5. I'm using Oblivion XP for leveling, so I have decent control over my stats...running 85 strength and endurance, and over 50 in block, blunt, heavy armor, armorer.