Observatory 2.1.5, now available on the Mac App Store, resolves an issue where the album hierarchy was not always correctly created for watched folders that had this feature enabled. With this update Observatory also stops bugging you for App Store ratings. If you want to leave a review please do so, but it will not remind you anymore.
I recently picked up where I left off for 2.2. That release has some long overdue new features, and a complete rework of an existing one. It‘s way more exciting than 2.1.5, but then this is just a maintenance update.