The Russians can't get odds on the defense ANYWHERE. That was my biggest concern. finally gave up trying to hold Moscow, even for a little while. Can't be done. What I have decided to do was stand my ground in places where the German player has to spend his mechanized units, even if its a losing battle for me. If you can take out 15-20 mech units, its worth losing 20-25 Russians, I think.
No, I did not have the forces to hold Sevastopol and the forests necessary to keep Leningrad in supply. Stalingrad is up for grabs. My southern army will be stationed close to the turkish border. The one thing Russia has going for them is that most of my armies will be in forests or mountains so that if the germans want to attack and capture any of the strongholds I choose to hold, they will need to bring most of their army. Which means the other strongholds should be able to attack out of their prepared positions.
On a side note, the most devastating piece the Germans have is paratroopers. As if the mech component wasn't enough.....