Blizzard almost always brings changes introduced in Experimental Mode into the full game. An exception to this is the Moira rework that they have been tinkering with since July. Still, the last set of Experimental Mode changes introduced on Aug. 24 made their way into the game on Aug. 31.
The latest set, listed below, include a nerf to Roadhog, buff for Torbjorn, and shotgun pattern changes that will affect six heroes.
Although he was only buffed recently, this Roadhog nerf feels like a long time coming. Roadhog had his damage increased and has been extremely difficult to deal with. The new changes decrease his projectile damage from 7 to 6 (150 total per shot). With this change, Blizzard is "looking to keep Roadhog’s Chain Hook combo reliable, but not overly powerful against heroes with higher health pools."
Torbjorn's shotgun-style secondary fire of his Rivet Gun is receiving a damage increase of 10.5 to 12.5 per projectile (125 total per shot). Torbjorn's primary fire is objectively better in practically every scenario, so Blizzard is attempting to make his secondary fire the preferable option for close-range encounters with this change.
Finally, Blizzard is changing all shotgun patterns from random to set patterns — affecting Ashe, Doomfist, D.Va, Reaper, Roadhog, and Torbjorn. Refer to the photo above for a visual example of the new patterns. It doesn't appear to be a major change, but Blizzard claims that shotguns will now be "more reliable by removing the random rotation applied to each shot. Individual pellets within the shot will still have a tiny amount of variance to their firing angle for the sake of the shotgun weapon feel, but this change will provide significantly more control over aiming these weapons."