I agree that changing the game could lead to all sorts of confusion, but there is always room for improvement. Just look at all the rules changes that have gone through A & A. One thing to try is multiply the IPC’s by 1.5, ruond up for the Axis and down for the Allies, and leave the units the same. So the IPC’s would be like this:
( I had to do this from memory, so for the players who live, breathe, and die this game gimme a break)
Russia 24 to 35
Germany 32 to 50
England 30 to 39
Japan 25 to 41
USA 36 to 53
Allies 90 to 127
Axis 56 to 91
The gap in the IPC’s is bigger, 24 to 35, but the ratio goes down, 1.61 to 1.40. I think you might be able to play this way, but who knows without play testing.