Why does Fiora´s passive give her a shit tone of damage + sustain ?

I find that this is the main problem with Fiora, she has way to much sustain for way to much damage. 3% of a targets max health at level one (Without counting the ad bonus), on the champion with the lowest amount of health at level 1 (Aniva , with a whopping 467) is 14.01 bonus true damage, which along with Fiora base ad of 60 makes 74 damage at level one with a auto attack (Without taking into account a Doran´s blade, which most Firoa´s start with, or the Ad runes that she can buy). The damage is really high, but ok , I mean , she has to have some sort of passive, I guess . But then , it heals her, and while it still is for a small amount early game , if combined with grasp of the undying , then it becomes straight out annoying and terrible to lane against . Also it gives her bonus move speed , so she can smack you and run away. Could we nerf either the damage or the sustain ?