She's overall very easy to disable and unless you faceroll people and get a stacked mejai/sword of the occult + red buff to slow people who surive your burst down till you actualy kill them, she's not really that special 1 on 1 either, she's pretty good against normal solo queue teams though, hard to find anyone that uses wards, pink wards are even more rare, and I'm even going to go into oracles. Her passive is one of the most useless ones in the game aswell.
Also, apparently riot was going to remake her, but failed and never really did it, and then nerfed her because people who wanted a remake got mad and started making smurfs and facerolling low level people, which in turn cried to riot and she got the nerfbat to the face, and now she is a mere nuisance against anyone willing to spend a few gold on oracles/pink wards.
Eve's success in a game depends more on how good the enemy team is then how good you are, even if you know how to use her in any given situation, there's very little you can do if the enemy team churns out some gold to take away the only reason they had to fear you.
Its still possible to win as her though, if you manage to faceroll people hard in the very first levels and get yourself some serious level and item advantage, and even then, if the game drags on for long enough, you'll can still be countered hard.
Anyway on other stuff:
Not a big fan of either xin or irelia, they're good and all but, its sort of aways the same thing. Now that xin is free everyone is spamming him on solo queue, and seeing a champion on everygame makes him uninteresting very fast, I tend to go for champions people don't play all too often but can still be viable, instead of cookie cutter xin doing the same DPS build everygame, dashing at people for crazy deeps the same way, etc etc. Irelia's a bit more fun though, she has more flexibility then xin does with a lot of burst to back it up, and she's not as easymode as xin is.
Might take a look at Xin 2.0 Jarvan IV after people stop spamming him every game on solo queue. Anyway Olaf is probably the only Tanky deeps I'm not tired of seeing yet. Why does riot not make real tanks anymore? They made two supports, one of which is sub par, a xin + garen lovechild, a sub par ranged champ thats totally not based on ashe, etc. Its getting old already, I would go as far as to say that trundle and irelia were the last interesting champions they made. Altough I have to admit Jarvan looks ok, despite being another tanky deeps.