The whole problem lies on Japan’s absurd overpowerness. No matter what house rules are present, Japan will always take Soviet far east and China. Allies have nothing to prevent it.
Why Japan’s role is always trying to rescue Germany via marching to Moscow? Why Japan always outproduce Germany and USA? It is neither fun, nor historical plus it totally deprives Pacific front and two ocean going approaches for USA.
Typically USA esablish a pipelines in North Africa while abandons Pacific, Britain in N.Russia, Germany turning into surviving mod waiting Japan to recue. I’m really sick of to see the same thing.
The solution is make Germany 2 times stronger than Japan considering 1942 borders, make Soviet far eastern and Chinese territories less valuable (Making two territory worth 1 with Nos), Hawaii factory with 2ipc value, then rebalancing.