People who call Fiora "braindead easy" are disgusting and should try her.
How people love hating on Fiora, am I right or am I right? Fiora is definetly an interesting champion that uses a unique mechanic that's totally different from all other champions, but is she OP or not? And regardless, does she require skill or not?
My personal opinion: Fiora is moderately overpowered but can be countered with skill Fiora requires high skill, I have no idea why people say she's easy.
Let's not get into why I think she's sort of OP because I could be wrong, but here's why I think she has an EXTREMELY high skillcap:
1/3: Timing her W The skill is extremely slow and has a cast time, but it acts as a block, so you have to predict stuff BEFORE it happens in order to block something, aside from predicting disables to get a better effect from the skill.
2/3: Believe it or not, it's very hard to hit all directions on her R: She has low CC since her W is hard to hit, making it hard to get all directions in time. You're gonna say she has a speed boost to help, aren't you? The enemy can do one of the following two things easily to escape:
- Flash away, instantly removing the speed boost to stop her in her tracks
- Cc Fiora and escape the ring while she is disabled. It's a very simple escape and requires Fiora to know what her opponent is going to do and when to even hit one vital.
3/3: Fiora is extremely predictable
Passive: Let's enemy know where Fiora will try to strike Q: N/A W: Slow with a cast time E: Let's them know when Fiora is gonna crit them and when to run from her to avoid it. R: Literally points out where Fiora is gonna try and attack you. R: Let's the enemy know where Fiora must go next to heal
Fiora may be overpowered, but she has a high skill cap! (Not a Fiora main talking, not even a Fiora player talking.) Before you hate on Fioras, maybe play her yourself? It can't hurt!
then 
easy.