She's fine. Nobody see's her in games anymore, so they forgot how to play against her. I'm just Silver 5 but nobody knows how to deal with her and I can actually carry games with her (or help other teammates so they can carry). I think the problem that a lot of people are having right now is her itemization. Her recommended items are not the best ones. AD Eve is far superior to AP Eve. She gets a massive attack speed boost from her E and can keep up with fleeing enemies with her W, so you can get lots of auto-attacks in.
My current build (also in order of items bought): Stalker's blade (warrior enchantment), Boots of Mobility, BoTRK, Randuin's omen's, Banshee's Veil, and Tri-force.