I just polished up a longstanding todo item from animators: Make the controls easier to distinguish/select.
A bit of history: My old blender rigs used controls that spanned each finger, that scaled up or down to curl it, and rotated to rotate it. I used IK, which meant the tip of the control always aligned with the tip of the finger- but it had limited reverse-curl, and no tweaks. For Big Buck Bunny, Nathan Vegdahl took the idea, but changed the implementation to action-constraints, solving both problems but creating another ( controls no longer align with the fingers – hard to select). I’ve taken that same setup for Gilga, and animators instantly complained about the difficult selection.
My solution was to color each finger uniquely (duh!) and to make the controls themselves deform matching the fingers, that way, they stay completely aligned with them. Short Demo video below: