Examble in Skyrim my first character is sneak / archer / dagger type. But sometimes I'd like to go for two handed / heavy armor examble but I dont wanna do it with my sneak character.
So you could play with more characters than one easily choosing when launching game instead of trying to find your other character's save game in list
I think it doesnt require very big update / patch to the game and I think most players would appreciate it. I think that kind of mod will come to PC or so but Im Xbox player so...
Thats very badly explained but hope you get the point.