Fiora is SOOOOOO broken. I mean like release Vayne levels of broken.
The damage is out of control. If you're a carry you've got about 0.5 of a second to react, and your reaction better be to flash or you die instantly. I have never seen anything like it. Actually it's like playing against a fed rengar, except Fiora doesn't even have to be fed to do this. You can be equal items with her as an ad carry and there's absolutely nothing you can do if she gets on top of you. Even if you arcane shift or rocket jump away, she'll be back on top of you soon enough.
There's a reason she has become a priority pick in LCK and China's LCS.
I'll say, but I think she's in the same boat as
. Lots of damage but lots of complications and can be countered. Her skill cap is very high too but that's just me.