I've said many times that it definitely is more potent post-patch because of the buckshot multiplier being 'fixed'
My issue with it being nerfed is that the only alternatives are not as good. The model 10 factory is probably the only comparable. Yes the Trench gun has better fire rate but the spread is too high. Yes the 12g slug has the same range but the power is worse.
What you say about storming trenches with it is absolutely bang on. It's the perfect weapon for that scenario.
For the people saying they get 40+ kills per death I just straight up don't believe it unless they are camping objectives in conquest. Playing operations (properly) it's just not possible simple as that.
I consistently get in the top 5 (mainly because our medics always top the game, probably because of all my deaths/revives) and my KDR is 1.28. I might get 60 kills but I'll get like 45 deaths.
I'd get a much higher KDR if I ran around like a bitch hipfiring with the MP18 or the Hellriegel but I'm not in it for the KDR. I'm in it for the relentless objective attention. Shotgun is the perfect gun for the role I play.
For reference I did use the 12g and the trench last night and still ended up in the same position so it's definitely more to do with being a good shotty user than just that gun being massively OP. I do agree a n00b would have more chance of getting the odd kill here and there with the model 10 hunter but it's not like it's an instant 80 kills a game weapon. You do actually have to be good with it.
And counting for less than 5% of all kills with the shotgun I'd assume it's safe from nerfing once again