I regularly use sections in my page builds, as they’re a great-time saver when creating simple layouts. I also regularly add custom classes to these sections in the backend, when I need to add some additional css styling that can’t be set in the section settings.
However, because these custom section classes can’t be controlled within the editor, I find myself having to create multiple section clones for every single tiny variation I make of them.
If developers had the ability to view and edit these custom classes in the page editor when in developer mode, it would be an absolute game-changer.