MCG still has a spool up time and fires at the same rate constantly,the patch notes said this was changedbut its not. Shotgun reticle is still causeing a fps issue after GU 07 that is all.
If you haven't already, I would suggest submitting a bug report using the in-game interface. Instructions to do so can be found in the link below: https://help.station.sony.com/app/answers/detail/a_id/33994/ In addition, we now have a game-play bug sub-forum where users can post, report, and discuss in-game bugs. You can find it by clicking here.