Well the point that Dyna was trying to say is so that people who do add END will not be adding it for nothing if their weapons have a shield block, but if you don't add END, then that shield block on your weapon would be useless anyway because it's so small.
People who don't add END shouldn't get more block rate - they chose another stat over the defense stat. I don't see the problem with that.
Thats because you're a Cleric. =_=
Wait... so am I. Anyways, I really still don't think that would be fair to Mages. After all, they are weak and brittle and snap like a twig when hit with something heavier than them... like a Feather.