A lot of my work in Character Animator has been making very flexible puppet characters that I can reuse as different characters (there's an overview how I do it using Layer Picker here: https://youtu.be/y6kVQpLESb8)

A lot of the labour comes from adding layers into groups with different coloured versions of the same objects for things like skin colour, clothing colour, hair colour, eye colour, etc. But if I would be able to say apply a HSL effect to a group of objects and put those sliders into my Controls, it would mean instead of having say 4 possible skin colours, I could now use HSL sliders on the skin group to tweak it to any possible shade.