Anivia rework is a complete FAILURE.
So now that a few days have past since 6.9, we finally have some form of solid numbers forming up. Now remember, it would be better to wait for about another week before any conclusions were made, but sometimes there are champs that are easier to observe.
Malzahar is one, but I want to analyze Anivia's numbers more to show how the rework was a complete failure. NOTE: All information is taken from champion.gg. So if that site is accurate we can then make some conclusions.
First thing I will point out is the DROP in play rate. Now normally this isn't a huge factor unless if a champion has an extremely high/low play rate. Not even a full week after the release of 6.9, Anivia's play rate has dropped from about 4% to about 3%. Normally, a huge massive change such as this would cause a champions play rate to increase as a larger number of people are trying out the changes for themselves. For Anivia's play rate to drop by 1/4 shows just how poor the changes made her feel.
Her win rate dropped by 4% from almost 53% to 49%. We can determine that Riot has made it extremely difficult to play half of Anivia. Riot's idea of making her a more area control mage has made her burst completely unreliable. Add that on top of the pathetic ult change that really only works when playing against sub level 10 new players and its no wonder why fewer people are playing and she is overall worse. Anivia is a BURST CONTROL MAGE, not a pure control mage.
Now the item changes. Anivia very often builds RoA and tear to help her with her massive mana usage. With the nerfs to zhonyas and RoA, her average number of deaths has sky rocketed. The weak item choices now in addition to her huge stat requirements is mostly to blame for this.
I understand what Riot was trying to do. They were trying to pigeonhole Anivia into being only a control mage with unreliable burst and more damage over longer fights. However anyone with any brain will not stand in her ult for more than 3 seconds. Riot once again was taking one of the single most balanced champions in league and changing them for absolutely no reason.
The Anivia changes should simply be reverted. They are a complete joke and that doesn't even include how bad the item changes are for her. Don't buff her, don't change her ult growth, just revert the changes.