If these bars are accurate, they have changed the gun in a significant way.

A guy called tonkatsuu on Reddit did an analysis, shrinking these bars down to the 130 pixel size from the normal site, and seeing the change.

Old Gyllenhaal versus new Gyllenhaal:

ROF - 11 vs 17
Blast Radius - 76 vs 96
Velocity - 90 vs 47
Stability - 53 vs 54
Reload - 68 vs 38

The nerf comes to velocity (nbd) and reload (bigger deal). Wolfpack rounds unknown. They seem to want to change the gun from the DPS monster it is to a slightly slower damage dealer with a bigger splash.

Coolest part of the image is the carnage zone sticker on the rocket.