To avoid icons redundancy between groupy tabs and Win10 taskbar, just an idea: maybe it´s not possible to make win 10 task be aware of Groupy groups, showing just the group, one icon, and not every app and folder icons in the group, don´t know, but what about making Stardock very good utility TILES do that job?, be aware of Groupy groups and show just a tile (thumbnail-icon) for every Groupy group?
Stardock Apps symbiosis.
Hope you´ll consider it.
Thanks.