Well, I think they removed too much semi-auto recoil in RO2. The SVT40 and G31 feel too much like an M1 Carbine or the .276 version of the Garand. Their recoil wasn't too high in RO1, especially the retail version. IRL they kick at least 12-18x harder than an MP40...doesn't feel like that in RO2.
One German officer decried the Russian use of what he called "gangnam-style tactics" in his diary, likening the fighting style of Russian submachine-gunners to that favored by South Korean mobsters.