Hey, noticed some changes to the sound effects, in particular the nades got louder and packs more boom; similarly, the US 57mm AT gun has the sounds of the Soviets AT gun (I think), and the 88's have a louder boom as well.
I'm not sure but I felt sounds like the US 57mm and the 88's would be better if kept the same to distinguish them from the rest, like say from the Soviets' AT guns...
Other than that, Soviets sounds are pretty distinguishable and good, like the Mosin and the rolling threads of their tanks.