This tool is pretty intuitive,it is an enhanced controller that can inherit and tweak Morpher animation.

Workflow:

1,It will automatically create a customed controller UI for selected mesh that already has Morpher animation.Every slider has been linked to a Morpher Target.
2,The original Morpher animation will be baked to controller sliders' movement.
3,The controller will take it from here.Artist can add keys to controllers to modify the Morpher animation.