Is it perhaps the larger map in Global40 that’s screwing everything up? The Axis have a lot further to go for Moscow and are a lot further apart for cooperation than they did even in AA50. And perhaps the crazy ridiculous NB/AB rules that let people zoom halfway across the map in a single turn, especially for the Allies, those might be OP?
The fact that America can reach Gibraltar in a single round is BS (and THEN be able to go to both Germany AND Italy from there) when Germany and Italy simply HAVE to use that SZ to combine naval forces; and would STILL lose in a straight up IPC fight against the US, never mind the UK.
I think AA40 was designed with a dedicated Sealion in mind; its just too easy to beat up the UK at the beginning of the game without US help for the first 3 rounds to not seriously threaten it.
Also, J1 attack… It might actually be balanced, game wise, in that if Japan waits till round 3 to attack, the UK and ANZAC are making about 10-15 extra IPCs between themselves vs. Japan NOT making those 10-15 extra IPCs for those first 3 rounds… Adds up to about 30 IPCs, the US war NO. Only difference is that the US is MUCH better positioned to use those extra 30 IPCs than if they are split into two 15 IPC bonuses for UK and ANZAC, there’s much less those two powers can really do with a 25 IPC/turn than the US’s 82/turn.