I often find that much of the Russian fighting power becomes stacked in Belorussia. Btt by building eight tanks each turn, I can easily use the combined forces to crush the Belorussian army, and after that the door to Moscow is blown wide open.
The loss of the US convoys is not that terrible, together they are only worth ten (25% of US total income)
The game is not unbalanced if the allies are coordinated and work together.
Dear ANON long post (if you are still out thar),
What UK,US & SOV players would allow a GER AC to survive in the Baltic SZ after UK1, US1, or SOV2? This GER build would allow for a massive SOV INF overload that the German player could not beat.