USSR = Shock troops or Katyuska rockets? either case its opening-fire? Let artillery work in “Katyuska” mode with stronger attack but hit can only affect infantry? So you might waste firepower when not enough enemy infantry
Germany = FTR get +1 attack modifier and each gives 1 ARM +1 attack modifier when enemy FTR are not present.
UK = Fighter defense in UK due to high radar density? Somehow I don’t think there was as many radars in Africa so don’t want all British territories to have the advantage
Japan = FTR gets +1 attack modifier in naval combat, DD fire in the opening-fire instead of main-round for first cycle of naval combat.
US = INF gets +1 attack modifier in the first cycle of combat of amphibious assault.
USSR: i think those siberian troops sure were more of a threat to turning the tide against germany than Katyuskas. I admit Katyuskas are fun toys. The shock troops idea ( some 500,00 troops and armor and planes) seems more of a larger issue than a single weapon of a few rockets.
UK: UK fighter defense is based on better pilots, and having radar to protect england and other select territories. Africa would not have such a proven defense, but India, Canada, Austrailia and England would.
All else looks good.