Nothing was changed on MG42s in last patch.
People try to make it out as if something went suddenly and dramatically wrong, and accusing Relic of retardation and what not kinds of insults.
MG42 is today exactly the same it was 2 months ago.
Infact the ONLY change it has received including open beta, was a 4th man, to bring it to 3/4 the survival of a Maxim. Before that same patch, Maxims absolutely assraped MG42s, and had done so throughout closed and open beta, and no sov fanbois even batted a fucking eyelid.
Yes they have been like this for a long time but the recent AT Grenade/Panzerfaust/Armored Car changes have shifted meta a bit and made going for flamer scout cars (drive it up to a MG42, roast it then kill it on the retreat back to base) more risky/less viable.
Before, there was an easy (some might even call it cheap) counter to the MG42 that can now be fought off easier.
Thus, some problems like too inefficient flanking became a lot more evident.
At the same time, two maps on which the MG42 is very powerful were introduced to the game. I think that may be the strongest influence on the perceived problem.
It is just a lot of stuff coming together at one time.
I really hope Relic aren't too zealous in their nerfing.
MG-spam might be not fun to play against but playing gren spam just to not get torn a new one by M3s was neither.