I think you guys are going to like Burden when you get it. But..how do I say this. It's not Whisper. It's not going to change how you feel about snipers in PvP. If you aren't accurate with them now, you're not going to find yourself racking up kills because you unlocked this one. It feels good and its recoil is similar to DARCI (a good thing) and the low flinch will help you clutch out a kill here and there, but you will generally miss the same shots you miss with any other sniper rifle. It also has a fairly long zoom making it a little hard to work with on smaller maps. It's great that we have an option that feels this good in the Primary slot, but don't expect to go from hating snipers to loving them or some such.
Is this shotgun a keeper for PVP? Good Bone Structure with Fullbore (+range) Accurized Rounds (more +range) Opening Shot (+range and accuracy on opening shot) and Threat Detector (increased handling, stability and reload speed when in close proximity to enemies). Also has Range Masterwork option.
Absolutely. But the question is do you like slug shotguns? That one has fantastic range. It won't feel as good or kill from as far as Chaperone, but it shouldn't be too far off either. It's not common in PvP because it competes in the slot with a variety of easier to use shotguns, fusions, Luna's, NF, and so on...but that doesn't mean it won't get the job done if you want to run a slug shotgun in your energy slot. Like all slug shotguns, they are feast or famine.
I'd suggest keeping it and spending some time with it in PVP. If it's not a weapon type you enjoy, no reason to keep it. If you do like slug shotguns, that's just about as good a legendary one as you can get. Note: it is useless in PvE. If you aren't into crucible toss it if your inventory space is tight or something. Should be particularly good with Way of The Wraith + something like Ace of Spades in the kinetic slot.