I believe he was just offering up some ideas, not suggesting that all of them be implemented as is or necessarily at those values.
To the low income objection, it’s true that typically in A&A the Atlantic crossing is difficult for the US to set up, but that’s in large part because their starting TUV is usually much lower relative to income. In 1940 or 41 or 1942 the game has them building up over several rounds so they need higher income to create an expeditionary force and a navy and enough fighters and carriers to match Germany’s air builds. But that whole play dynamic comes from the fact that their TUV is low compared to Axis and the units are all out of position. If we give the US more starting units, with a more useful starting composition, put them in stronger starting locations, and then the need for such a high US income per round is less pronounced.
I think that was the idea at any rate. Could still be that the ownership of territories in China be tweaked. But there again, it depends on the starting TUV for the Allies in the region and what aid Russia can send.
I think the experience of G40 needn’t be a guide for what works or not in a general sense. Since the TUV available at the start could be a lot different. Creating an entirely different play pace and different income requirements.
Russia likewise, could field more starting units as a way to compensate for lower starting income.
For the Germans you could find other ways of develop an interesting opener. Perhaps with more subs to raid, as opposed to making naval combat attacks. Or preserve a carrier option, but not one that allows for early 1940 style sea lions, since that hardly makes sense for 43. The battle lines could be drawn in an entirely new way.
I’d suggest first designing the openers, by configuring the units in the border zones and contested areas. Then concentrate whatever forces are needed back in the core, so they don’t have to puchased but still need to be moved out. At capital territories for example.