Revert Zoe's Q and R interactions and she will be fun to play.
> PADDLE JUMP When Zoe casts R - Portal Jump while a Paddle Star is active, the star's travel range now changes when Zoe reappears at the cast location, rather than as soon as Portal Jump is cast. EXCUSE ME? The timing of Zoe's Q - Q - R combo is less forgiving
While I don't think Zoe is unplayable; she feels horrible to play as of patch 8.4. Imagine if Zoe's flowy hair started to become jittery. It would feel off, strange, every time you would play her it wouldn't feel right. The same can be said about her game-play. For a champion that embodied the concept of flow so heavily it's sad to see her gameplay no longer reflect that. As a Zoe main, Her E and W were the real problems, and I feel like they have been fixed. But Zoe is not in a good place right now.
https://na.leagueoflegends.com/en/news/game-updates/patch/patch-724b-notes The patch in question.