As a Shocktrain owner of 3, I say nerf it to hell. As you said, zero effort weapon. At least those lazy mofos should learn now how to aim. This rework is good for one. However I'd suggest a range nerf too. 400m should kinda do the job, so they could still avoid orkans and tarans, but should get closer to do the hit, giving more chance for the knife fighters to catch them. As of the shotguns, I hope the new spread will apply to our old ones too.