I'd just like to point out that the OPs post numbers are literally all over the place. 185 + 185 =/= 270, There's a T34 variant without a gun specification at 90F, which might be the 76? But then specifies the 76 at 140F, which is just flat wrong. Unless they mean the 85, which is 130F.....
Because they aren't dropabble? That's just a guess as to the reasoning, but i agree that they should
With cons only having 1 slot, maybe ppsh still shouldn't? Idk about that one
Possible yes, but StGs do not follow this rule, same with thompsons. Although those weapons are so potent that having them not take weapon slots would be game breaking.