Same with me. No hard data to support a change in HoI4. When you compare submachine gun usage, specifically the Soviet PPsh, you get increased supply consumption, but no increase in effectiveness (ie soft attack) at the scale of HoI4.
Isn't the submachine gun significantly superior in close-quarters situations like urban and trenches (when already in the melee part)? While inferior at long-ranged duels like in hills/mountains.
I think the game should have combat phases during a day, something like:
* dawn -> 1-3 hours of artillery duel
* morning -> one side advances exposed to enemy fire (the exposed side takes more casualties depending on it's cover possibilities)
* mid-day -> Close-quarters fight (both sides do about equal damage)
* second half of the day -> Depending on the tactic it could be another advance+close quarters for more speed oriented tactics, or long-range file + artillery, or even a counter-attack
I'd split provinces in "10-flags", when attacking one sides starts with 2 and the defender with 8, the province is taken when 1 side has all 10.
Also there is the whole question that plains are actually a terrible terrain for infantry to advance, unlike in the game. Just read any war account. Open plains are a death trap for advancing infantry, they get mowed down by machine guns, or even rifle fire. Just like in beaches. Forests lead to ambush opportunities but also provide cover for advancing infantry, so they take less loses. Urban terrains were extremely hard to fight, they should decrease the power of artillery and tanks significantly, so the casualties were about equal in urban duals nearly always.
Unfortunately the game doesn't allow for radical changes in land & sea combat like I have in mind, so there is no way to test if my ideas would end up more realistic then the current system...
Back to the original question of the thread, I think it would be a great addition to the game if "Infantry Equipment" was split into 2 things "Support Weapons" meaning mortars, machine-guns, bazookas, etc, and "Rifles". An infantry battalion would require both, but you could also train a Militia with only rifles.