Eternal character staying relevant in seasons

I love the game and how different every season has been so far. The only problem I have is that my characters in the eternal realm seem to be unusable. I think if you let the characters from the eternal realm also have seasonal benefits during that season (i.e. vampire powers in season 2), this would keep them from feeling too weak to play anymore and stop you from having to spend countless hours trying to get relevel all the classes. You should still have to create a new character in the season and level up the season to get the rewards on that character. You can still have fun with all your characters and it will make more casual players be able to enjoy the seasons.