I think it'd be a great idea within reason. If wonjongkam got a hold of a much bigger title like 140, i wouldn't wanna it to be allowed because he'd have to fluxuate almost 30 pounds between fights to be competative and that would take its toll an ultimately shorten his career significantly. On the other hand floyd holding it between 140 and 154 isn't all that bad because you don't necessarily have to be 154 to fight at that weight and him being naturally much smaller than 140 he could do it easily. Within a span of three weight classes it should be allowed but once you get up to 4 or more, you start pushing it.