I think he hopes to exploit Calzaghes openess to right hands. Jones still has speed and some power, so could be a big problem for Joe.
I don't see how he won't be the same after this. The only thing i await to see is how he fairs against a bigger guy.. If Diaz can take his shots...
I don't see why he would vacate. He finally gets hinslef a title, then drops it right away!? Why would you do that? It's silly IMO.