So with Jhin coming out what reason do we have to even consider picking caitlyn ever again?

She's already by far the worst Marksman in the game currently.

He dueling potential is insanely negative unless super fed compared to any other marksman. He "lane bullying" isn't even good unless in certain match ups (say graves but even then he has enough burst to zone her just as hard) Her late game is horrible for her early game to be meh Her ability to "zone" is hardly noticable unless it's in a really sloppy teamfight especially since it seems her traps hitboxes got reduced after the update

Besides liking her there is absolutely no reason to ever pick caitlyn over any Marksman in the game, with Jhins release that will just seal the deal.