Otto is right, all of this specific scripting is for media filename and folder naming. It has nothing to do with your embedded tags. I include the release type in the folder so I can control the how the plex scanner scans things based on timestamps as described [HowTo] Configure Popular Tracks Section to Prioritise Albums over every other release type!.
You can remove that if its not of interest to you by changing $rreplace($if(%albumartist%,%album%),[:"], - ) ($left(%date%,4)) [%releasetype%]/ to $rreplace($if(%albumartist%,%album%),[:"], - ) ($left(%date%,4))/
For the release types and embedded tags, ensure you have the tag releasetype within musicbrainz.
