Ok so you blocked all of an attack. If you are a warrior, you could have parried said attack too, and it wouldn't have done much damage, and even if you failed to parry, warriors tend to have decent armor. If you were a rogue, you could have dodged, which would be 0 damage, or parried, which wouldn't do that much damage. So blocking all of the attack isn't actually that great compared to what else you could do. The weapon speed reset is pretty good, but it wouldn't change the course of the battle very much.