Please consider adding an option to Picard to add releases to a user specified collection as the tagged files are saved.  For example, if I have a collection and set up the (new) option of saving to the specified collection mbid in Picard's settings, then whenever I save tagged files Picard will attempt to add the release to the specified collection in the MB database.

For more information, see the discussion in #metabrainz between https://chatlogs.metabrainz.org/brainzbot/metabrainz/msg/4413327/ and https://chatlogs.metabrainz.org/brainzbot/metabrainz/msg/4413354/ and between https://chatlogs.metabrainz.org/brainzbot/metabrainz/msg/4413906/ and https://chatlogs.metabrainz.org/brainzbot/metabrainz/msg/4413966/