Just been comparing the steering lock on my new GSA with my older bikes and a mates r1200 gsa tc , I think the main problem on the newer bike is that there is a large amount of slack at the steering head when the lock is on allowing at least 4 or 5 inches of play at the ends of the handlebars which due to their width gives anyone trying to break the lock a large amount of leverage.
Combined with the movement it is more than enough to quickly and easily smash the lock.
On my 2014 model GSA which locked the steering in either direction (left or right) there was far less movement at the bars when it was locked and allowed less effective leverage , my mates tc is the same .
My old Honda XR250 and even my CCM 404 which also have steering locks incorporated into ignition lock have little or no movement at the bars when the steering is locked and on my GSX11000 Katana which has a lock built into the side of the steering head there is zero movement at the bars when locked and so less effective leverage to smash the steering lock assembly.
Good enough reason for me to always use a secondary U Lock , chain or Disc lock on a newer GS/GSA