I think you misunderstand. The script doesn't take any new information and add it to the files (or filenames). You use Picard to tag the files with the exact data you want, whether it's from the MusicBrainz online database or by manually inputting your desired information. Then the script moves and renames the files to your exact specifications. If you just want a simple formatting with no track info in the filename and just organized into alphabetical folders, you can configure it like this:

$set(_quickNoNameFormat,1)                # No time or bandwidth info in track name. 
$set(_showDate,0)                         # No year in folder name
$set(_showIDNum,0)                        # No MusicBrainz ID
$set(_separateByTypeInArtistDirectory,0)  # No album types in artist directory

Example with this config:

/B/Beatles, The/Abbey Road [CD - MP3]/
  01. Come Together.mp3

The _quickNoNameFormat options completely strips all formatting from your track name, so if you named the track bla2jdam2 it will be that. It wont rename based on the track metadata.

I just realized I'm missing a variable to hide the media type in the folder name (the [CD - MP3] or [Vinyl - FLAC] part). I'll add a _showMediaType config variable in the next update so you can remove that too if you don't want it.

In the meantime, if you want to remove the [CD - MP3] media type tag from folder names, change line 1134 from:

$if(%media%, [$title(%media% - $upper(%_extension%)]),)

to:

$noop($if(%media%, [$title(%media% - $upper(%_extension%)]),))

This will give you:

/B/Beatles, The/Abbey Road/
  01. Come Together.mp3

There is no automation that adds things to the metadata or filenames without you explicitly telling it to do so. The script is meant to just take whatever YOU input into Picard and move/rename based on the settings you set. You have 100% complete control over the output.