Zoe is going to be the fastest champion to be reworked
This has been beaten to death, but given the amount that Zoe is spreading from mid to bot, both as APC and support, it needs to be said again:
Why is her W still a thing?
Just as an example, I was playing Brand APC with my support Karma. We poke their Jhin and Zoe support to about half health, then all in. Zoe gets a random Redemption, healing most of our damage. She flashes into us and exhausts. She then picks up an Ignite that just spawned from a minion her W killed. She ignites me, forcing myself and Karma to flash away. She picks up those flashes, flashes into us, and E's Karma as Jhin ults.
It's damn near impossible to get away from Zoe, due to the movespeed W grants and the slow into sleep from her E. The RNG on her W also fucks up gameplay on both sides. If you don't get anything worthwhile, it feels really bad to have an ability that doesn't do anything. But if you get a good item, Zoe becomes EXTREMELY overbearing to play against, since she can heal from Redemption or engage with a Gunblade active. Being able to pick up Summoner Spells makes attempting to outplay her a nonstarter, as anything to do to escape or fight just gives her another avenue to kill you. She's heavily contested as a mid laner in pro play, and she's overbearing and unfun in matchmaking. There's nothing major that Riot can do right now, as she's still fairly new. However, they can tweak it to make it so her W goes on a long cool down after use, similarly to Warwick W. Until she's eligible for a rework, that's the best solution.