I'm missing all ID3 frames which do exist in the standard (ID3v2.4).

Display (or make selection possible) all possible ID3 frames of the standard ID3v2.4.

If a standard ID3v2.3 or older will be found in a file, try to "move/display" the values to the correct new ID3 frame. If not possible, don't display them anymore.

Also display the correct column name as defined in the standard.

It's horrible to read different headings in misc. ID3 programs.

Some values are NO ID3 standard (size, added). Would be fine to add the prefix "file-": "file-size", "file-modified", etc. and for added to the Serato database: "db-added". That would be all more clear.