3 more hate spikes on average to kill a squishy and many more to kill a non-squishy is not harder to use, that is unplayable. try to lane as evelynn and never leave your lane, just farm and fight the mid champ, see how it goes, even currently without nerfs, she's unable to win most 1v1 matches, she only takes the lead after she's started roaming and picks up kills and assists. Sure a 4-0-3 evelynn can do well against most mid champs who're 0-0-0 but that's b/c she has 4 kills and 3 assists...... at 0-0-0 she has a hard time 1v1ing any other mid laner, the massive nerfs to her base hp, her hp per level, her Q dmg and also her E dmg are insane.
This nerf puts her back into the dark cave she resided in so long, the cave we call unplayability, or at least unviability.
If anything Riot should have just nerfed her W or something, anything to make it harder for her to roam so quickly, that's the problem, not her damage, her damage only becomes insane after she's become very fed, which happens because of her insane roaming abilities.