Probably the last time I can post before I'm out of Wi-Fi range for a month or two, so here are a few more things to throw out there.
1. When they're implemented, randomized hull/plate numbers for vehicles. For example, rather than all Panzer IV Ausf. Hs being Panzer X, or all Bedford QLDs having license plate Y, having randomized numbers so no two vehicles have the same one? I know this seems pretty inconsequential, but I think it's one of those features that when players see it, they'll think "Damn, these guys thought of everything."
And I'm sure it's planned, but all German vehicles having attached foliage. You just have to watch German footage during Overlord to know that like 90% of all German vehicles in Normandy were literally covered in attached foliage.
2. I think it'd be a huge immersion boost to still display weapons that aren't equipped on characters. For example, when you have an LMG that's not equipped, it becomes slung over your right shoulder and hangs horizontally against your right hip. When you have an AT weapon or a rifle that's not equipped, it becomes slung across your back from the left shoulder. When you have an SMG that's not equipped, it becomes slung from your right shoulder. All of these simulate the effects of weapons having slings, as they would IRL, but which, I imagine, are too difficult to create in-game (collision physics alone would be a nightmare). Speaking of collision physics, you shouldn't be able to prone if you have an LMG that's not equipped; the front half of the weapon would go through the ground. Trying to prone while not equipped on your LMG should result in you equipping your LMG, then proning. Not unrealistic, because IRL it'd be an awful idea anyway, for the same reason; you'd be shoving the barrel straight into mud and soil.
3. I'm sure there's some form of running animation in place now, but I may as well say it; the running animations the Axis have in RO2, the way
everyone seems to run in war footage when their weapons aren't slung over their shoulders - running while holding whatever weapon you have in just your right hand - is not only realistic, but also just so happens to look
incredibly sexy. Though unlike RO2, I think everyone, not just the Germans, should run like this. Based on the screenshot in the "New Year 2016" update, this animation may already be in place. Just please, implement it for all weapons, not just rifles! Actually make use of the Bren's carryhandle... it's called that for a reason.
Now, to further the idea of weapon randomization; all percentages would depend on map/unit. For example, a rifleman of the 21st Panzer or the 716th could have, say, a 65% chance of a K 98, a 20% chance of a Lebel, and a 15% chance of a G 98. By contrast, a rifleman of the 12th SS Panzer or the Panzer-Lehr would have a 100% chance of a K 98. Or, in the case of LMGs, a 100% chance of an MG 42. I think weapon randomization is especially crucial for weapons like the Lebel, MG 34, No. 1 Mk. III, and Ruby; I don't want to see these ignored, and I'd love to see different weapons dealt to all players on a historically accurate level. I guess this isn't universal, but I PERSONALLY think it'd be cool not knowing if I'm going to be issued X or Y weapons. It also adds a deeper sense of realism, because you can't just look at a guy with a Thompson and say off the bat "Ah, he HAS to be an NCO."
Also, having given it some thought, I think it's good magazines will be discarded upon reloading; on top of maintaining historical accuracy, it also encourages players to use every last round, and reload only when magazines are empty, resulting in more realistic gameplay.