What exactly does Riot want Evelynn to do?
Right now Evelynn's high base damage means she can go tanky while still blowing people up, so we're hoping she'll think more about her priorities with these changes. Basically if Evelynn wants to kill things quickly, she'll need to build offensively for it - if she wants to tank it out in the middle of fight, she'll have to itemize for that. Also, we know Evelynn's arguably not a fighter, but we put her here for the sake of better organization (nyah).
^From her last set of Olaf-esque nerfs ( http://na.leagueoflegends.com/en/news/game-updates/patch/patch-413-notes )
Very well, I suppose Riot's accomplished their goals with her last set of nerfs; you either have to build straight glass cannon to be a threat or straight tank to be around in a team fight.
The problem is that they took away her ability to assassinate a long, long time ago and unlike assassins such as Kha'zix or Zed, she has no "get out of jail" card. If Evelynn builds glass cannon and goes into a team fight, she will get evaporated (without the killing power of other melee assassins).
So she builds tanky... Great, now what? She has no form of CC besides the AOE slow, which is a one-shot type thing and doesn't require her to be in the thick to use anyways. So what reason is there for her to be tanky? All she will do in teamfights is ult for the shield and slow and then proceed to attempt to tickle the enemy team to death; hardly giving the enemy team any reason whatsoever to even glance at Eve, let alone try to bust through her shield and take her down.
I'm just confused as to what the end-goal is here. I realize that Riot has a vendetta out for "bruiser" junglers who offer a decent amount of tankiness and damage, I'm just not sure if they see the fallacy of building straight tanky on a champ that offers nothing besides damage and ONE minor CC (slow, which is more of a side-effect of the use of the ult, not generally the reason why you ult) or building glass cannon on a melee champ with no form of escape and no way to really "assassinate".
As it stands now, Evelynn has the 4th lowest win rate in the game (lower than Urgot and Olaf for anyone curious). She has been, historically, one the least mechanical-intensive champions. If a semi-perma stealth champion with a kit as simple as Evelynn's has a 43.37% winrate I can't help but feel it's not just a case of a high-skill cap champ, not just a case of a knee-jerk set of nerfs, but a problem with design philosophy overall; that is the, "either-or" reasoning; You either can do a lot of damage or you can be tanky. I really think this needs to be re-evaluated in regards to champions who have little to no CC or assassination power or escapes.
(Eve main btw)