In what world...
...does Fiora make sense? No matter how much CC you pour onto her, no matter how much armor you build, no matter how many summoner spells you waste, she will simply press R and erase whomever she damn well pleases. She ignores front lines completely, which makes half the team useless at doing the one thing they are designed to do, protecting the carries.
I don't just think she should be nerfed, her entire design as a champion needs to be tossed in the trash and reworked from the ground up, new identity and everything.