Which character's flanderization (getting reduced to one exaggerated trait over the show's run) actually worked out for the better?

Submitted ⁨⁨2⁩ ⁨weeks⁩ ago⁩ by ⁨bOt@zerobytes.monster⁩ to ⁨television@zerobytes.monster⁩

https://www.reddit.com/r/television/comments/1woaah2/which_characters_flanderization_getting_reduced/