Zoe has buffs on the PBE.
* Paddle Star damage with rank increased to 50/80/110/140/170 (was 50/75/100/125/150) (level and AP scaling unchanged)
* Sleepy Trouble Bubble cooldown reduced to 16/15/14/13/12 (was 16/15.5/15/14.5/14)
These changes improve Zoe's XP scaling and her late-game power.
Personally, I think these will help Zoe a lot. She has always been a late-game champion, and these changes will only make her stronger in her ideal situation without making her stronger when she's supposed to be weak. Early- and mid-game champions like assassins will still have the upper hand early on, but Zoe will have a greater opportunity to outscale them by playing safe. She will be encouraged to either build late-game runes like Dark Harvest and Gathering Power to double-down on the late game, or take runes like Unsealed Spellbook or Biscuit Delivery to smooth out the early so she can survive into the late game without feeding.
I think this will also open up more room for Zoe in the support role. Since she will scale a bit harder with level, rather than gold, she can afford to run a bit of a lighter build and still have a good amount of power. It probably won't be a "meta" thing, but she will be more powerful in that role than she was before.