Lol, I'm not saying she's balanced, of course she's not, she just came out, give Riot some time to actually balance her.
Her E is indeed interesting, a form of CC that is both better and worse then the ones we are used to. Better because it amps damage, worse because the target of the CC get to actually have a short moment of time to react to it when they are hit. Its nice to see Riot coming up with fresh things to add to the game.
Her W might (MIGHT) be balanced due to it not existing unless she picks something up, which will be a random thing most of the time, its a completely random basic ability with a very strick ammo system. The only "problem" it might have is its cooldown, but we'll see what Riot does about that. I have no idea if the stats/damage it provides are balanced or not. But it is a interesting new ability, that can't be denied.
She is also still buggy and her hitboxes are crap, but that's nothing new for League. XD
There is no need to get bent out of shape over the new champ, she was make by CertainlyT of all people, so what can go wrong? XD