Caitlyn's Net shouldn't proc headshot.
I feel that the problem with Caitlyn is that her net gives her the ability to combo people that are already next to her. Caitlyn's niche is supposed to be the sniper. She uses her long range to damage people at a safe distance. Her net goes against this.
If somebody manages to get on top of her, she still has her net dash/slow to create some distance again. But why does it proc headshot? Shouldn't she be less effective once somebody manages to close the distance like most snipers in videogames are?
It punishes anybody who tries to close the distance by not only slowing them and setting them up for the e-q combo, it also gives her an empowered auto attack.
Maybe the slow could be increased so the e-q combo is more reliable and to emphasize her safety more, but she shouldn't gain extra damage by using her safety ability.