Yuumi Changes were bad for Gameplay and the numbers support it
Yuumi's WR is currently 46% which is higher than its been in several months however her pick rate is worse than it has ever been. Sitting at a 1.73% pick rate and declining. Now to further push this being heavily influenced by Gameplay and not performance. The worst WR Yuumi has ever had was sitting at a 38% WR but while having that WR she still maintained a 2.5% pick rate.
Now this can definitely extend to more Champions than Yuumi but the design team in general are either getting Lazy with their reworks or not factoring player enjoyment but instead how they are performing in soloq exclusively. What bad about this approach is that you wont see those champions picked unless they are over-performing and even then the people that are picking them is not for enjoyment but to get an easy win.
It makes me nervous for the upcoming Fiddlesticks/Volibear reworks because it seems the focus isn't on fun but instead functionality.