Thats true but with Swagger it he was almost just a random jobber at that point and to make matters worse instead of taking a few months to build him up they had him cash in straight away. No one took him seriously as champ because just months before he was losing to Santino.
With Rhodes or Barrett it would be totally different, Barrett has already main evented PPVS and beaten the likes of Edge, Jericho, Cena and Orton, Rhodes has been pushed very well lately and he owns victories over Rey and the current IC Champ. Both men also have history with current champ Orton which would help as well.
Even if neither guy are ready to win immediately the WWE has a whole year to build them up like they did Miz. It just seems like this would be a good opportunity for the WWE to make a new star when they are desperately in need main eventers instead of giving an established Main Eventer a title he could just as easily win without the breifcase.