Collections that auto populate based on a tag. e.g. I have a ‘smart collection’ called ‘My sans’ if I tag any fonts with ‘My sans’ they auto appear in that smart collection called ‘My sans’. This way simple, personal, custom sorting of fonts contains much less friction.
Current workflow: Remove current custom tag, add new custom tag, move font from one collection to another, drag font to right side bar to remove from current collection.
If Smart collections were based on tags all you’d need to do is change a tag and the font would brilliantly move collection automatically.