I think the USA non-combat turn zero pretty much balances the game 50/50! If you want, you can give the Axis a bid of 3 to 6 IPCs, but I doubt it’s necessary.
I don’t think Russia gets erased by Germany. Russia actually starts with a healthy number of troops even out of the box, and because Russia goes before Germany, Russia has a chance to shape the European map in its favor. With an USA turn zero, the Allied Atlantic fleets will survive, which means much earlier Allied pressure on Norway/France/Morocco, which really limits Germany’s ability to secure a permanent economic advantage against Russia. In other words, in my opinion, the problem with the OOB 1942.2 setup isn’t that Russia is too weak – it’s that the US & UK are too weak. Giving the USA a zero turn helps protect both US & UK assets, which fixes this problem.
Related to #2, if you haven’t already read Black_Elk’s sticky thread on Russian Openings, you really need to. It will totally change the way you see the 1942.2 board.
https://www.axisandallies.org/forums/index.php?topic=35487.0