Does it actually matter when Japan declares or whether UK spends in Africa? The Axis don’t need to contest Africa at all to roll to an easy win.
The key problem is that Axis has a number of ways to have an offensive force double as a defensive deterrent while the Allies have none. It’s a force multiplier that can’t be countered. For example, a fleet sitting off Kwangsi with a harbor and airfield built, with extra air parked in Kwangsi as well can a) keep the Allied Pac fleet at enough of a distance to prevent them from threatening anything; b) defend the entire Asian coast from Malaya to Korea; and c) pose a mortal threat to Calcutta and force the UK Pac forces to sit at home; d) degrade UK Pac income; e) support counterattacks against DEI; and f) support a quick rollover of China.
Losses can be replaced in 1 turn while Allied losses will take 2-3 turns to replace. And this can be set up by J2.
Germany can do something similar as well just by keeping its aircraft in Western Germany, preventing fleet building by the UK while defending against any landing that might be made, and threatening Russia and the Med at the same time.
Axis can mass their forces immediately and easily while the Allies can’t and this presents a fundamental gameplay problem on this map.
The force modifier only works once and after that it doens’t
So you have your fleet at kansi, now korea and japan mainland need to be defended against US forces from hawai.
Sure it can counter but if you lost japan im not bothered about losing my fleet against yours.
Or if ill take carolines with a sizable force and have my backup forces in hawai and Queensland. Now you can kill my fleet ill destroy whats left of yours and india is free to walk up to kansi and take your bases.
Airforce in germany is nice, as long as it is there it cannot help in russia, and once it flies off that UK fleet of gibraltar can hit anything it wants. You even have to put a lot of in with those aircraft otherwise i might just suicide my inf+art on them and destroy most of your airunits on the ground.
Yes air can be used pretty efficient in this game but it does not mean it is impossible to fight against.
And without afrika Italy has nearly no income at all so the allies will have a lot extra income to spend on ships to defend their fleet.