The balance of the second round raises questions
The idea of supply hexes in the city center is not a good one, I think
There is no point in encircling the city when reinforcements including tanks and heavy weapons can appear through the beautiful Moscow metro. I admire the Soviet engineering genius, but I think that then the Moscow metro did not go far beyond the city
I think it would be better to add trains for the USSR. In general, it is strange that the USSR does not have trains, especially considering the historical context of the battle for Moscow. It looks especially interesting when Germany has trains

The USSR is fighting for its capital on its territory, while Germany needs to restore the railway tracks and change their track
