Crittlesticks has a 61% winrate bot
Source: https://www.leagueofgraphs.com/champions/stats/fiddlesticks/adc/platinum
Of course with such a low playrate this means nothing, but it's still funny imho. XD
Anyway, wanted to thank the balance team - according to that same source, Fiddle's winrate is an almost perfect 50% as support, mid, and jungle, which means you actually did it - it seems that the last change effectively fixed him without breaking him.
This gives me hope that you might actually fix the botlane issue too in midseason, if you actually put your mind to it and set it as your goal.