The Color Group function is really useful, but it only works in the creation phase if you select multiple colours. There's no obvious way to add a colour to a group after it's been created - there's no contextual menu option, there's no palette menu option, and seemingly, you can't drag and drop it into the folder, which is counterintuitive as this is something users do all the time with Layers. Similarly, color groups should function the same way inside the CC Libraries palette. There should be a shortcut to add any selected Swatch or Color Group to the current Library, with a warning if duplicates already exist (based on color value, not name); with option to keep separate swatches or replace with new one.