Limit Caitlyn's head shot to one per unique champion target for a time.

Being able to land 2-3 consecutive head shots on the same target is pretty brutal. Especially since most champions cant stop it from happening (unless Yasuo, Braum or some other champion blocks them or intervenes someway). Her long range makes most trades favorable and free poke easy to land. So when she hits you with that 2-3 head shot combo, most likely you either instantly die, have to immediately back, or are forced to blow a summoner spell to try and escape. But usually she just ults you to finish you off. So by limiting her to 1 head shot per unique champion target in like a 2-3 second window. That 1 shot nuke combo is prevented. She has more than enough power to survive the laning phase and press towers with her siege.