I think that the examples only work for Mp3 files. They would not work for MP4, Flac, matroska and all the others that do not use native id3vX tag formats.
I also have problems to imagine what the display should look like for a bunch of selected files e.g. from the same album by the same artist but in different file formats, e.g. mp3 files for audio only and mp4 for a video file.
What should the display look like for files that do not have all tag versions in a file but feature the same data in several tag fields.
E.g. the ARTIST would be the same in all files but some files would feature that data only in the V1 or the V2 tag (or even APE tag).
What would happen to fields that are mapped - which is regularly recommended for FLAC files and the field TRACKNUMBER (flac) being mapped to TRACK in MP3tag.
In general: your idea is not new, see e.g. here: