Huge Caveat: I never noticed that SS/BS could be 'exploited.' So, I could totally be misunderstanding how SS/BS worked together.
But from the log Bornok posted it sounds like if the second target was between 5 and 8 yards away. All of the extra attacks would hit the first target. Which meant that for every WW target one took 3 hits and target two took 1.
I don't think this is a PVE nerf because SS/BS is being changed to reduce burst damage. You still get 5 extra attacks from SS, they just can't happen within a certain amount of time. So sustained it should be fine for PVE dps.