Pure Speculation
So, Caitlyn is getting a rework. I don't mean to talk balance on this, but my first serious thoughts on a new kit show a lot of fun potential. here they are:

Passive: Sniper
http://ddragon.leagueoflegends.com/cdn/5.19.1/img/passive/Caitlyn_Headshot.png http://ddragon.leagueoflegends.com/cdn/5.19.1/img/spell/CaitlynAceintheHole.png Caitlyn gains a stack of Sniper every time she makes a basic attack or uses a skill. on reaching 6 stacks, her next basic attack gains double range and +X damage.
Q: I have absolutely no Idea:
have fun with it CertainlyT. (no dashes allowed.)
W: Handcuffs? How about FootCuffs?
http://ddragon.leagueoflegends.com/cdn/5.19.1/img/spell/CaitlynYordleTrap.png Exactly as it.
E: Hat Trick / Shrapnel bombs
http://ddragon.leagueoflegends.com/cdn/5.19.1/img/spell/ZiggsE.png Caitlyn lays a circular pattern of 5 explosive land mines. Each landmine is hidden under a black top hat. They take ~0.5 seconds to set up. on detonation these mines deal low-mid damage, slow their targets, and apply a stacking debuff. Caitlyn deals % increased damage to targets for each stack of this debuff they carry.
R: Under Arrest
http://ddragon.leagueoflegends.com/cdn/5.19.1/img/spell/CaitlynEntrapment.png http://ddragon.leagueoflegends.com/cdn/5.19.1/img/spell/CaitlynAceintheHole.png Works like her current R, but deals less damage, slightly shorter range, knocks her target back slightly, and roots them for X seconds.