I think that watching Susan in a relationship with Byron would have made Season 5 unbearable for me! I can see what they were trying to do with the Byron character, but the actor is so horribly miscast. He just comes across as a creepy cult leader. The telepath story has so many holes in it anyway that they would have needed an incredibly charismatic actor to carry off the role successfully. I think they usually cast really well in B5, but not in this instance!