as asked in the Beta discussion thread here is my suggestion for diferent Fanart for TV Show Seasons.
With the modern UI Option we finally got unblurred fanart. I want to suggest to enhance that feature to allow different Fanart per TV Show Season.
Emby and offer to setup different fanarts per season and using one or the other as metadata organizer for Infuse, it would be easy to setup different fanart per season.
Also for the non Emby/plex users it would be easy. jut search for fanart in the season folder or have fanart named like fanart-season01.jpg in the main folder