Zoe W Change
I see clips almost everyday of Zoe picking up like 4 summoner spells in a single battle. She flashes like twice, ignites someone and uses barrier. I think there should be a cooldown of atleast 10 seconds. Summoner spells can make a huge difference in the game, hence the 5 minute cooldown or so. The fact that she can acquire them as use them in lane like they are nothing really speaks of how OP her W is.