Zoe's only part of her kit that is overpowered is her Q mana cost(which can be justified tbh) and her E.
Zoe's E has a heavy slow + full 2 seconds of sleep + damage amp + Trap that applies same effects on one ability.
There are only a few champions that have an ult that does what Zoe E does.
I'll admit Zoe E is weaker than those ultimates( numbers-wise) but Zoe E is up more often than those ultimates which is what makes it overpowered.
Zoe doesn't really have an ultimate, so it makes sense to give her a larger pool of damage with basic abilities.
The problem arises when Zoe is able to burst as well as an Artillery mage while having hardly the same mana problems thanks to her E.
Zoe's Q is mostly fair. Strong during laning and in the midgame, but when lategame teamfights roll around Zoe Q is going to fall off in usefulness by itself.
Then Zoe's E comes along and makes her Q just as scary as it is in the laning phase.
Zoe's E makes her Chunk tanks mid-lategame thanks to the true damage portion of the move.
Zoe's E(combined with Q and R) make her an amazing roaming support, roaming mid, and an interesting jungler, but Zoe's E is overpowered due to how much it does at once.
The Zoe E base damage needs to be gutted and her E AP scaling needs to be buffed.
I am saving up BE for Zoe because toplane bruiser Zoe build is going to be as powerful(give/take) as the Ekko, Fizz, and Leblanc tank builds that popped up last season!!!
Zoe's EQ does 1/3 of most mage's health(when both are fully maxed so lvl 11) with BASE DAMAGE!!!!
That's a pretty big problem!!!
Zoe's risk factor also is reduced because of her W RNG.
It's always a positive effect that has too big of a catch range and lasts 20 seconds on the ground...
Most mages at level 3 cannot do more damage than Zoe's Q so they can't stop her very easily from grabbing anything that falls on the ground.
That's fine for the most part, it was a telegraphed powerspike that can be dealt with for any effect that Zoe gains.
Zoe gains an defensive Item active?
don't trade with her
Zoe gains an offensive item active?
Back to tower and CS with abilities
Zoe gains an offensive summoner spell?
back to tower and Cs with abilities
Zoe gains a defensive Summoner spell?
don't trade with her
Zoe is the Quinn of midlane.
Her Early game she does more damage than you and will outtrade you at nearly every opportunity.
Her midgame is okay but she'll lose some steam generally if she isn't fed to hell.
Her lategame is based around getting random picks on priority enemy team targets, in lategame teamfights she's next to useless.