Zoe

Her kit is overall bad game design. That being said, I DO think it's possible for Riot to balance her without completely reworking her entire kit, and these are things I've been saying since her release:

1. Rework the damn W. No more RNG in her kit.
2. Remove the trap from the E, but give it a range buff and a slightly faster travel speed. Dodging the E and then bursting her before she gets it back is her only counterplay, and yet, if you dodge the E, there's still a risk in there being the trap sitting there for another 3 seconds. The only way to stop this is to have a QSS or for the support to have a Mikael's. If nobody can cleanse that Sleep from you while you're still Drowsy, you die. And, since she only really has 1 consistent damaging ability (the Q), they can't exactly gut the damage on that because then, she wouldn't be a burst mage anymore.

They could also go the way of making her a control mage, rather than a burst mage. GUT Q's damage, I'm talking max range this thing is doing 500 rather than 1500, but give E the aforementioned buffs without the nerfs and again, rework the W. Increase cooldowns across the board, but decrease mana costs. This would also be a balanced way of reworking her kit into something that's not too strong.

she sucks

The changes that were hinted at by Riot Korea look like good ones. They are keeping the whole burst mage aspect, but no longer would her E linger if she missed the skillshot. Then there were some other changes, but I dont read Korean. The E one is the only one I know of because people were talking a lot about it when the korean stream showed it.