The new naked bike version has supposedly lost over 40 lbs and has a linkage type rear suspension, One would think some of that would carry over to the new Versys (assuming there will be one).
I think the dirt bikes went to the rear linkage to allow a progressive rate (rising rate?) to better maintain rear wheel contact in rough places. My only problem with the Versys suspension was the original high static friction that has gradually subsided with miles ridden. A more progressive rate has the potential to allow a bit more freeway plushness, hopefully without too much dive & wallow. I'd vote for a linkage rear if it doesn't add too much cost