Fiora's passive and Ultimate are missing one important change
The critical points should be set relative to the direction the enemy is facing. It doesn't make sense gameplay-wise or thematically that they're just points on the ground that follow the player.
Other examples of such abilities would be Shaco and Casseiopia.
It's strange there are people who think that just because it's possible to change direction on a dime in this game, that it's at all easy. If that were true then Cass and Shaco would be the hardest characters in the game. Remember you have to either click reasonably far from your character to make sure it registers the direction (and so they start walking) or be incredibly good at clicking a direction right next to your character.
I'm not suggesting the vitals be any smaller. In fact, they could could decrease the number to 3 and increase the size of each to adjust for this if it's too easy for better players to do. But it would provide counterplay aside from standing with the vital to a wall and losing farm to reset it.
can backstab