ugh... obviously most of the people in this thread have not played a healer ever or at least in wotlk... in anything more than 2v2 it's a game of wack-a-mole on crack where one mistake, one wasted gcd, means almost certain death for a teammate or yourself.
"why is it 30% damage but only 10% less healing" yeah, give me a debuff that increases my healing taken by 100% (50% x 200% [100% increase] = 100%) to compensate for MS and I'll agree that's a fair assumption.
why did they keep buffing resil? because damage skyrocketed, yet health and (to a lesser extent) healing did not.