I did make a post here, but it seems I pressed the wrong button or something and didn't actually post it. Whoops.
91/30 scope - It's a PEM, which was much, much more common in Stalingrad. It was an older design and much more costly and time-consuming to produce, which is why the PU was introduced - from what I recall the PU didn't really start appearing until late '42 and wasn't truly prolific until late '43-early '44. It's more realistic to have that than PU-series scopes left and right.
MKb.42(H) and MP-40 II - I dunno about you, but if I wanted to figure out if a weapon was any good, the first place I'd be sending it is the single largest encirclement at the time and the fiercest battle in human history. Regardless of whether they were physically seen there or not (and apparently the MKb was), simple logic dictates that at least a few would have found their way there. The MKb could mount both a long eye relief optic like the Kar98K and a bayonet, so I see no reason they shouldn't be included.
The WH hero - Oh come on. Ski masks, padded jackets, gloves... all part of the standard issue winter gear in practically every military for at least the last 100 years. My grandfather's wool balaclava (and mine, which is practically the same) can both be pulled up to cover the lower half of the face like that, and nobody likes frostbite. Soldiers will readily ignore parade-ground grooming standards in combat, and WWII was the single most intense conflict in human history. Are you seriously telling me none of you expect a single soldier to not care if their tags are hanging out, or if they aren't supposed to have X medal pinned in Y location on Z day? I sure don't care and nobody I know does either. I can tell you right now that the first thing anyone does out field is pop their collars to keep the sun off their necks, roll their sleeves, and throw empty mags down the front of their shirt rather than stuff about with mag pouches (then replace them into the pouch when they have time). All of these things are supposedly against some regulation or another, but nobody cares because there is no place for that in combat, especially the real thing.
Personally, I can't wait for the game and I'm keen to try out some of the new weapons. I was really glad to see the Nagant 1895 get included, by the way.