I personally think that she is in a perfect spot right now. I've seen a few streams (Elementz comes to mind), in which high level players are saying she's very strong or OP. While I am not a high level player, I must disagree. While I don't want to sound arrogant, I think Elise is a similar situation to Darius in the sense that she counters a lot of the popular top champions (but not Irelia from what I've experienced, dat true damage), and this automatically makes people assume that she's broken.
Yes her Q damage when built with mpen is very high. But the rest of her human form kit is very VERY easy to juke. Her stun is a rather slow skillshot with a very clear animation when it is being fired. Her W (as awesome of a skill as it is) is very easily dodge-able with any minions around. I find that people need to play against Elise the same way you would play against a Khazix in lane.
Don't fight her without minions around. Just having minions in the lane with you already decreases her ability to land her full human form combo on you (which is required in order to burst you down in spider form). While the Q does hit hard, the closer you get to half HP the less damage it deals. And once you hit 50%, if she wants to deal good damage to you she needs to be in spider form. This means you either have to let her walk up to you (or stun you), or use rappel in order to get her spider Q.
Essentially the keys to beating an Elise in lane is to dodge her 2 skill shots, and to always engage her when you have minions that can block her spider bomb.