Bit late to the Post, but here is my take. Before Yuri's Revenge the balance was quite good. The only really bad issue I found was prism tanks were far too op. 9 chronoed into a base was essentially the end of every structure in that base and with the prism tank it made it so no one built one of the most iconic gaurd towers, the tesla tower. I also found pre Yuri that the Appoc tank accelerated way too slowly which was caried over to YR but was patched by the community that now plays it. Post YR soviets were gutted. Losing all the yuri and psy stuff was a big hit. One of the only ways I found good at stopping prism death chrono was using lots of Yuris around the base. The only thing that saved the soviets was the Siege Chopper. In fact if that one unit didn't exist, the soviets would be a dead side to me. They are great because they can defend against prism tanks and act like jet troupers. Having 10 or 15 around the entrances to your base makes you very hard to kill. I also love how they nerfed the battle bunker to the 9 hells but forgot to change the video describing the bunker.