The Mage Update seems to not have hit the points that were said.
For example, for Annie they said they wanted her E to be less disposable and just for building her passive up. And for Swain they wanted his spells to be less "Fire and forget" but just buffed his Q. For Ziggs they didn't like he just stalled out games by holding waves, but just gave him more seiging and pushing power. Seems like they got sidetracked kinda. I mean the Annie change too is just a small buff that gives her a better reason to use her Ult and stun together.