I have read from quite a few place that they are going to nerf shotguns, if this is true...

Seriously? Shotgun are the last thing that come to my mind when I think overpowered.

Edit:

I checked Robert Bowling's Twitter, and I found this

fourzerotwo

@Molyn3aux There is a shotgun bug that is being fixed, not rebalancing.

I really hope the bug wasn't the additional pellets in each bucksoht added with extended mags.