Patch 6.18 isn't for you. It's for the pros.
Just a reminder that Patch 6.18 was focused entirely on balance tuning for the World Championship. For this patch, Riot didn't give a shit about the balance of Ranked or normal games. So yeah, changes like the Shen nerf that seem unwarranted were because he's strong in pro play, not because Riot is clueless or hates Shen.
Next patch, things will go back to normal where Riot balances around normal people (roughly focused around Plat skill level). Just chill for a bit people. All shall be well, and all manner of thing shall be well.
Edit: It's been pointed out, but I wanna mention it up here: Despite the focus of this patch on the Pro scene, the rest of us plebs haven't been forgotten. We got a new Yorick (also not forgotten).
Also Edit: I like this guy's comment, but it came late to the discussion, so I'm giving it a bump here
still gonna be pick ban in worlds.