I've probably got 100 more kills than deaths with the boltshot but that doesn't mean it isn't a weapon you should get at spawn.
It's basically an insta-kill weapon at close range and I know I'm just adding to the misery by using it, but unless you are playing btb with vehicles, it's the only useful secondary weapon.
Sure out of all the deaths, boltshot ranks low for what killed me, but each time I die from it, I shake my head at the thought someone believed a mini-shotgun should be given on spawn.
With the DMR/boltshot you can effectively stop almost any player from any distance. With dexterity, boltshot is ridiculous for double kills on close maps like haven.
It shouldn't be nerfed at all. It works great like it's supposed to, but it shouldn't be a weapon you start with but one you pick up.