I noticed a difference when I was going for one of the camo challenges (with no attachments on) in which I was getting hitmarkers at close range compared to pre-patch R870 without attachments.
Since I finished that challenge and now have the laser sight and long barrel, it's still a decent shotgun.
the range is little shorter for OHK but i've had it gold since lauch week and still use it all the time as long as you stay cqc you get ohk with no problems. Of course kids will rage about dying by a shotgun but they rage when you kill them with any weapon. LOL