As someone who plays Eve now and then, I can actually agree here. Eve is Vicious if you let her get that way. But just buying Oracles ain't enough.
As Eve, I see lots of People get Oracles. What do I do? ask for my teammates to kill them for me, or wait for them to get so Overconfident that they think the Oracle means godhood for them against Eve. a Smart Eve will get a Oracle herself, and just kill wards as you put them down if you Don't defend them, and will Nuke Champ's with the Oracle the minute she can and just rub it in your face. I should know, I do it all the time.
Anyways, back on topic. I like Eve, I like the fact that I can walk up to someone and in Two-One Shot them with Insane AP, Ravage, and Lich Bane. But she is so over-powered that I almost never play her anymore. She is just to easy. She needs a Good nerf, that is something I can agree on.
But to those that say that she is easy, your wrong. I say it because I play a Half-decent Eve, no means Pro, but half Decent at least and its boring to see 3k HP tanks go down in seconds in a good game. Playing a good Eve is like playing Brain Surgeon with a Nuclear Scalpel. One wrong move and it all blows up in your face, but alot of right moves and you find yourself with the Big Victory.