Why did Anivia not get the same treatment as Swain?
The exact same reasons swain uses his ult is when anivia uses hers. Except hers can be used for an instant double damage spell that will take out half plus your hp and back off.
Why did Anivias ult not get given the same treatment? Yes, the nerf gutted swain, and it will gut anivia too, but she deserves it.