I can see the WR as a Dual Sport, however to me an adventure bike must be able of putting on some days with big milage (600 miles or more) on the slab, say 10-12 hours of running time a day. Anything without at least a long day's ride to the adventure is a dual sport day in my book.
Using that logic, I think the 525 is at best a marginal Adv bike, and the 450 is about the same. Combine the short maintiance and overhaul intervals with the lack af a substantial subframe, no cush drive, smaller fuel tanks etc and I wouldn't bother.
I think they make really good Dual Sports, but not adventure bikes.