I'm really liking Caitlyn abilities description.

Q seems like a slower version of Ezreal skill shot that hits multiple targets. Depending on duration and amount of trap she can have up at once, W seems like it's great for warding and screwing the enemy team formation. E seems like a great escape with the slow + push back. Depending on the distance of the knock back, you might be able to use it as a way to catch up during chases.

I'm not sure sure how her R is going to work, but i'd imagine it's a long range hit at one target and other champs can get in between to take the damage for the target. Her passive sound amazing for last hitting and i can imagine top/bot Caitlyn just farming from the bushes.