Like the sound of editable fonts, can change the whole look and feel by itself. The customizer is a great tool but changing things like the background colour is not always great in isolation. It would be good to see a colour choice blend across all design elements, not just the background. Blends would nee to be set up by the developer and then changeable via the customizer. All great for non-techies who need a change every now and again and who are intimidated by the theme options panel.