Thanks for the DD. I suppose, this was the best that could be done, considering how politically complicated the China theatre was at this time.
I do, also, like that it won't be so easy for Japan to defeat China. However, there should be some option/decision that allows for variation from the historical here - Japan does things differently, that would allow for a possible defeat, at the expense of being able to attack USA/SE Asia so easily in '41, IMHO.
I think if japan doesn't attack china, i think mao would have been finished, since he let the KMT bloody themselves against the japanese while the CCP conserved there forces for the civil war later. But then if japan doesn't attack china, i guess it missings out on alot of manpower, factories and resources? not sure if in the WWW if china actually had any resources though?