miss and dodge are different theo. miss you mitigate with +hit, and shiv just needs 5% +hit like all other yellow attacks in pvp.
the dodge part *will* suck, but it really just affects rogue v rogue. i think thats why you never really heard about this bug; if a clothie gets shivved and randomly dodges KS, who cares if shiv is bugged to be undodgeable, and dodge chance is so low natively (compared to an evading rogue) that youre not at all likely to notice anything aside from the fact that a rogue is hitting you and it hurts. much less pay attention to what skills aside from finishers are dodged.
again, it sucks, but a bug fix is a bug fix. i hated it when they fixed the new rank of execute with sweeping strikes, but i got over it. its totally imba one-shotting a full life warrior just because i full rage executed the mage for 10k. but it *was* fun.