Yuumi has some nerfs on the PBE, but the W nerf is going to destroy any laning potential she has, and push the "AFK Yuumi" playstyle. : r/leagueoflegends
League Patch 10.15 to feature Yuumi, Swain buffs, Aphelios nerfs, more - Dexerto
Wild Rift patch 3.0b: Yuumi buffed, Jax nerfed
Yuumi nerf explained by riot : r/yuumimains
Riot bring nerfs to Yuumi and Graves in LoL patch 11.22 - WIN.gg
Yuumi nerfs coming ahead : r/yuumimains
LoL patch v9.12: Riot tease buffs and nerfs for Yuumi, Caitlyn, Ashe, more - Dexerto
Wild Rift patch 3.0b: Yuumi buffed, Jax nerfed
In Leagues Patch 11.22, more nerfs are used to Qiyana, Yuumi, Graves, KhaZix and Maokai - Game News 24
The Nerf to Yuumi has been released : r/yuumimains