To add the same kind of SELECT-menu for 'typo3/alt_doc.php' which is used in editing content elements in Quick Edit mode. In that mode is easier to edit 'Edit page header/ Edit page properties' information and individual content elements of the page using a SELECT-menu. Alternatively two buttons might do the same task.

To solve language problems in extra edit panel labels with a better way.

Make option to set as default of the 'Show secondary options (palettes)' as checked and option to hide that option in TS Config for users/user groups. Just hiding the option is problematic because the administrator must first mark the option as checked.

Add some hooks for other developers, especially a hook for controlling access for content elements

Add AJAX drag and drop for moving content elements from one place to another in the frontend editing.