Thanks for the feedback! Both suggestions have been implemented in version 1.14:

1 - Dials can now be drag and dropped between folders. You can also add new dials directly to a folder simply by bookmarking the site and choosing the subfolder

2 - The default sorting algorithm is now the one you suggested -- new dials appear last. The old sorting can be enabled in the settings (sometimes new dials first is preferable, for example when using YASD as a bookmarks manager it's better having recent dials at the top)