Yep, I listed those guns too in my guns list, cause they are pretty probable to make it to the final version of the game.
The MG42 wasn't a hip fire weapon so it shouldn't be in the game as a 'run around' weapon.
That is part of the artistic freedom the devs have.
Like hipfiring bolt action rifles. You can't do that in real life.
Some variants of the MG42 could be hipfired by really strong soldiers. Nobody complained about that in WAW. Besides, in Battlefield 1 there are soldiers that can hipfire heavy lmg's like the MG08, and battlefield tends to be more realistic than COD. Like some guys also said, quicksoping wasn't possible in ww2 either. If you can hipfire a M1903 in call of duty ww2, why can't you hipfire a MG42 or a Browning M1919? The devs could figure it out.