Regarding the MG42 "issue", the way I see it there are multiple options how you can go on about it:
a) If you wish to keep an Automatic Rifleman:
about the German lmg. The only comparable weapon was the FG42 + captured allied or chzech weapons like the MG26(t) or the Polish BAR. These were used in big numbers by the troops guarding the atlantic wall.
There are a couple things to consider still, even though it seems fitting to use one of these:
The FG42 was only lightly produced(around 8k if memory serves me correctly) and already discontinued in 1944, but I guess it wouldn't harm to have those on maps where a Fallschirmj?gerdivision is present. But even then I would class it as some more of a german "Specialist Automatic Rifleman Kit" you have to request(and only 1 or 2 of those in play) due to rarity and the fact it wasn't designed to be an LMG. The same basically applies to the STG44; and although produced in much larger numbers, the Germans had 2 fronts at that time to worry about and ship their newly produced STG44s to.
The Polish BAR had around 24k units produced and would see service on the atlantic wall, but personally I would not recommend going for it, due to it being a copy of the American BAR, which can lead to confusion, but also because the MG26(t) is an overall better contender for the spot as I will explain down below.
Finally, MG26(t) was used largely(to my knowledge) as part of the Bunker defenses to supplement the MG42s and other captured weapons, however in contrast to other ARs it was already widespread in the Wehrmacht as well as designated for use even before WW2 started. I personally don't think it was used the way the BAR was, but if you want a German BAR counterpart that is both common and comparable in strength to it, it is the best choice.
TL;DR here
FG42/STG44: Too uncommon, would only see service in FJ Divs(former), it was supposed to increase individual soldier strength(replacing Kar98ks rather than other automatic firearms)
Polish BAR: Could lead to confusion when similarly sounding weapons attack one another, not as widespread as the MG26
MG26(t): widespread, adopted by the Wehrmacht even before WW2, was used in the AW, best choice if you want the Germans to have a BAR counterpart.
b) Be creative and make each faction more unique in their ways of combat:
I personally think the Germans shouldn't have an AR(except 1 or 2 specialist STG44 and FG42 wielder) but instead have a larger focus on supporting their MG42. What they did in WW2 is to have another 2 soldiers solely dedicated to supporting the MG. These would be called MG-2 or MG-3(MG-1 being the actual machine gunner)one for loading and holding the belt to decrease jamming, and one for spotting and changing the barrel. Since weapons can't jam and the weapons can only be reloaded by the user that leaves the spotter and seeing how only NCOs are given binocs, they are practically worth their weight in gold in PR:N. So my suggestion would be to have 4-6 MG42s in play as part of the HMG kit, and have the German Automatic Rifleman be removed altogether in favour of the MG-2 role, in which you will be given the Kar98k and a handful of magazines(like 4 or 5), an additional ammo box, another bandage and binoculars. This would lead to more diversity in the factions and thus lead to more strategies and gameplay.
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