I just learned that Krita has "Clone Layers" with real-time updates! RATHER THAN USING THIS PLUGIN, USE CLONE LAYERS!

GLIS

Create duplicate of group layer and increase saturation. Useful when you want to increase saturation of a whole image or the layers inside the group (Very specific and personal for my needs). The default shortcut is "0", pressing again will delete the duplicated group.

Known bug: Does not work when the active layer is "Group layer", I don't know why)

Install

• Copy the folders from "GLIS/" and put them into "~\AppData\Roaming\krita".
• Open Krita, go to "Settings\Configure Krita\Python Plugin Manager" and enable the "GLIS" plugin.
• Reopen Krita.
• For a more in depth explanation, visit Krita Docs