A bunch of new suggestions :
-Periscopic view for tank commanders when they are in a tank with a cupola : This system would be similar to tanks with a periscope, but it would be with the “view” of the commander inside the cupola, you could then move freely your view between the slits of the tanks’cupola, and you could also maybe “zoom your view”, just like IRL if you approach your head to a specific slit. But of course, when you are turning your head freely between the slits, the spaces between the slits would be blind spots, just like the frame of the aircraft right now.
-Cycle the bolt of bolt action rifles with cranked bolts while aiming down sights : This could be a good way to “buff” some bolt action rifles, and it would also be historical, because when the bolt is cranked, it is very close to the hand, and when you are cycling it, your hand doesn’t obstruct your view when you are ADS, as opposed to the rifles with a straight bolt, which should still keep the mechanic of exiting ADS for cycling the bolt, because your hand would obstruct your view when you are cycling the bolt. This suggestion would then allow the snipers to cycle the bolts while ADS, because pretty much all sniper bolt action rifles had a cranked bolt.
-Allow the assault class to use pistol caliber and intermediate caliber semi-auto carbines : These light weapons were very handy, and historically were often used instead of SMGs by assault troops, because of their high capacity magazines and their manageable recoil due to their small caliber, the M1 carbine being the best example. You could also give the possibility for assaulters to use some bolt action carbines, more specifically the carbines that were reserved to the cavalry, which were also some kind of shock troops made for assault, like the japanese with their Type 38 or Type 44 carbines for example.
-Fix the Beretta M1918 and make it a semi-auto carbine : This would tie in with the previous suggestion, and it would fix the inaccurate depiction of the Beretta M1918, which is currently a SMG ingame, but it wasn’t historically, and maybe add one of the variants of the Beretta that was actually a SMG to replace the M1918 that should be fixed and become a semi-auto carbine.
-Nerf the rifle grenades by making them more realistic : Pretty much all the rifles with a grenade launcher had to be loaded with a wooden bullet before firing the grenade, because these specific bullets were needed to launch the grenade (instead of making it explode with a normal bullet, lol). This way, the reloading of the rifle grenade would be longer, but it would be more historically accurate, and there would be less “rifle grenade spam”. On the other hand, the rifle grenades should do as much damage as regular grenades if they do not already, and the rifles that did not need wooden bullets for firing the grenade (there were some, but it was not the majority) should keep the current animation and reload speed.
-Unlock new accessories for weapons instead of the same weapons with small differences : This would mainly concern the SMGs with all their different magazine sizes, it is quite weird to have to unlock the same SMG again with a different mag capacity, so instead, I suggest to just unlock a new mag in the tree, instead of a new weapon, so that you wouldn’t have to upgrade the same weapon with a bigger mag again (like Thompson or PPSh for example). This would work just like the bayonet ingame right now, you can decide to attach it or remove it, and the basic version of the gun for example would be the version with the smaller mag. For example: you unlock the Thompson with a 20 round mag at rank 2, and further down the tree, you can unlock the 30 round mag at rank 3, and you can buy these mags that you attach to a gun in the menu, just like bayonets that you can attach or remove in the menu right now.
-Unlock other accessories in addition to the bigger magazines : This would tie in with the previous suggestion, because the same principle could be applied to other weapons, this would include :
-Different scopes for some sniper rifle, for example the Kar98k was fitted with a variety of scopes, we could have the possibility to change them, but not for some rifle that were specifically designed for one type of scope, like the M1903A4
-Grenade launchers for some rifles that could have these attached like the japanese Arisakas for example: pretty much all the rifles could be equipped with a grenade launcher; but not for some rifles that were specifically designed for this use, like the rifles with a sight for the grenade launcher (like the Kar98k) or the ones specifically reinforced for that use (like the SMLE)
-Unlock different types of grenades for the rifle grenade launchers
-Unlock different types of rockets for the rocket launchers
-Unlock different types of shells for the mortars
-Unlock the detachable mags for the semi-auto rifles: historically, the semi-auto rifles had a detachable magazine, but very often they were reloaded with stripper clips, because mags were expensive to make. This way we could lower the BR of some semi-auto rifles, because the reload time would be longer, and we could unlock the detachable magazine option further down in the tree, just like my example for the bigger mags for the SMGs (this way, we could probably considerably lower the BR of the Fedorov Avtomat, because the reload time would take forever and it is weird to have a WWI weapon at rank V, and the option to have detachable mags for it should be further down the tree, it was historically reloaded with stripper clips, and we should also put it in the Machinegunner class, because it was used as a MG historically).
-Promotion system for the soldiers : This one might be controversial, but I find weird and annoying the fact that you have to unlock and buy new soldiers of the same class, like Rifleman I, Rifleman II, Rifleman III, etc… Instead, I suggest that we remove the I, II, III, IV, and each soldier is basically a “I” at the start, and then you can promote the soldiers to being a “II”, then a “III” after that, then a “IV” at the end. It would make some sense, because we can see the soldiers rank badge ingame right now, for example a Rifleman I has one rank bar, a Rifleman II has two rank bars, etc… It would be pretty satisfying in my opinion to see our soldiers becoming better, and I suggest that for every promotion, the maximum number of perk points for a soldier should be increased, because our soldiers would become experienced veterans. Accordingly, the actual maximum number of 50-60 perk points in total right now for each soldier would be increased with each promotion.
Sorry for the wall of text. 
As always, feel free to leave your thoughts. 
