I have experienced the problem in a Cessna 310, a 152, and on the ground. No weather since Friday afternoon.
As far as the subscription goes, I am going to make some phone calls Monday to see if the problem is on XM's end. Hopefully so. I want this fixed!
As far as on board radar goes, I agree, but tell that to my boss-man. I don't know he has the funds or desire to do that.