In my opinion, they should make parry and tower shields block 100% of damage, and shields should help mitigate magic damage based on their size. They should rebalance abilities around this idea. I don't see what the big problem is with cutting the healers a break every now and then by lucking out and successfully blocking. If they really want to make certain attacks always inflict damage, they can stick to magic-based attacks. In my opinion, this would help balance DRK vs. PLD after they sort out the balancing of Dark Dance and Sheltron.