Anivia did not need a nerf.

So, I think that Anivia WAS the most balanced champ in league, because she's a Mage that's bursty but doesn't 100-0 you with their combo (coughcough leblanc, Veigar, annie, velkoz) so you actually have a chance to fight them and have a fine chance of winning. Now, she's underpowered because her Q Ratio went from 0.5 to 0.375, her R's range is slightly shorter, and her only reliable damage is her E now because her w doesn't really help in combat unless you get extremely lucky (example- you find an angle that completely blocks off a route) and even then she can't fight because her Q Does less damage and her R takes like three seconds to do anything, which is the time it takes for her to die. If her passive, however, didn't change her defenses, that would actually be a reliable passive, but it isn't because it makes them do like twice the damage to you for six seconds where you can't move or fight back. Overall, Anivia is now underpowered and needs to be put back to her balanced form.