I was looking over the cards tonight while shuffling and an idea came to me. What if in addition to adding +1(/+2 at silver/+3 at gold) when defending a from a specific attack it also gave you 1 free surge when making that category of attack?
So for Willpower it would be:
"You gain +1 Armor (/+2 at silver/+3 at gold) against Magic attacks.
In addition, the Hero gains 1 free surge when making a magic attack."
Thoughts? I know it's still not much, but at least the card isn't bottom of the barrel.