To me both of them make it sound like it's designed to submit all clusters and files at once and that the files themselves will be uploaded to MusicBrainz.
If it were me, given that I don't think either of the suggestions are great and given that the plugin is already quite well known in the community under its current name, I would leave the name alone and just mention it in the description, the name doesn't actually need to mention every single thing you can do with it, after all.